diff --git a/discord/enums.py b/discord/enums.py
index a015cfad2..3c322b95c 100644
--- a/discord/enums.py
+++ b/discord/enums.py
@@ -680,11 +680,9 @@ class UserFlags(Enum):
     hypesquad_balance = 256
     early_supporter = 512
     team_user = 1024
-    partner_or_verification_application = 2048
     system = 4096
     has_unread_urgent_messages = 8192
     bug_hunter_level_2 = 16384
-    underage_deleted = 32768
     verified_bot = 65536
     verified_bot_developer = 131072
     discord_certified_moderator = 262144
@@ -692,7 +690,10 @@ class UserFlags(Enum):
     spammer = 1048576
     disable_premium = 2097152
     active_developer = 4194304
+    provisional_account = 8388608
     quarantined = 17592186044416
+    collaborator = 1125899906842624
+    restricted_collaborator = 2251799813685248
 
 
 class ActivityType(Enum):
diff --git a/discord/flags.py b/discord/flags.py
index 0376fe90f..50aa19f32 100644
--- a/discord/flags.py
+++ b/discord/flags.py
@@ -522,6 +522,18 @@ class SystemChannelFlags(BaseFlags):
         """
         return 32
 
+    @flag_value
+    def unknown_6(self):
+        return 64
+
+    @flag_value
+    def channel_prompt_deadchat(self):
+        """:class:`bool`: Returns ``True`` if dead chat prompts are enabled.
+
+        .. versionadded:: 2.1
+        """
+        return 128
+
 
 @fill_with_flags()
 class MessageFlags(BaseFlags):
@@ -740,6 +752,10 @@ class PublicUserFlags(BaseFlags):
 
     .. versionadded:: 1.4
 
+    .. versionchanged:: 2.1
+
+        Removed the ``system`` flag as it is no longer used.
+
     Attributes
     -----------
     value: :class:`int`
@@ -803,11 +819,6 @@ class PublicUserFlags(BaseFlags):
         """:class:`bool`: Returns ``True`` if the user is a Team User."""
         return UserFlags.team_user.value
 
-    @flag_value
-    def system(self):
-        """:class:`bool`: Returns ``True`` if the user is a system user (i.e. represents Discord officially)."""
-        return UserFlags.system.value
-
     @flag_value
     def bug_hunter_level_2(self):
         """:class:`bool`: Returns ``True`` if the user is a level 2 Bug Hunter"""
@@ -864,6 +875,14 @@ class PublicUserFlags(BaseFlags):
         """
         return UserFlags.active_developer.value
 
+    @flag_value
+    def provisional_account(self):
+        """:class:`bool`: Returns ``True`` if the user is a provisional account used with the social layer integration.
+
+        .. versionadded:: 2.1
+        """
+        return UserFlags.provisional_account.value
+
     def all(self) -> List[UserFlags]:
         """List[:class:`UserFlags`]: Returns all flags the user has."""
         return [public_flag for public_flag in UserFlags if self._has_flag(public_flag.value)]
@@ -914,6 +933,11 @@ class PrivateUserFlags(PublicUserFlags):
 
     .. versionadded:: 2.0
 
+    .. versionchanged:: 2.1
+
+        Removed the ``underage_deleted``, ``partner_or_verification_application``,
+        and ``disable_premium`` flags as they are not sent or no longer used.
+
     Attributes
     -----------
     value: :class:`int`
@@ -940,24 +964,19 @@ class PrivateUserFlags(PublicUserFlags):
         return UserFlags.mfa_sms.value
 
     @flag_value
-    def underage_deleted(self):
-        """:class:`bool`: Returns ``True`` if the user has been flagged for deletion for being underage."""
-        return UserFlags.underage_deleted.value
+    def quarantined(self):
+        """:class:`bool`: Returns ``True`` if the user is quarantined."""
+        return UserFlags.quarantined.value
 
     @flag_value
-    def partner_or_verification_application(self):
-        """:class:`bool`: Returns ``True`` if the user has a partner or a verification application."""
-        return UserFlags.partner_or_verification_application.value
+    def collaborator(self):
+        """:class:`bool`: Returns ``True`` if the user is a collaborator and is considered staff."""
+        return UserFlags.collaborator.value
 
     @flag_value
-    def disable_premium(self):
-        """:class:`bool`: Returns ``True`` if the user bought premium but has it manually disabled."""
-        return UserFlags.disable_premium.value
-
-    @flag_value
-    def quarantined(self):
-        """:class:`bool`: Returns ``True`` if the user is quarantined."""
-        return UserFlags.quarantined.value
+    def restricted_collaborator(self):
+        """:class:`bool`: Returns ``True`` if the user is a restricted collaborator and is considered staff."""
+        return UserFlags.restricted_collaborator.value
 
 
 @fill_with_flags()
@@ -1316,6 +1335,14 @@ class ApplicationFlags(BaseFlags):
         """
         return 1 << 8
 
+    @flag_value
+    def contextless_activity(self):
+        """:class:`bool`: Returns ``True`` if the embedded application's activity can be launched without a context.
+
+        .. versionadded:: 2.1
+        """
+        return 1 << 9
+
     @flag_value
     def gateway_presence(self):
         """:class:`bool`: Returns ``True`` if the application is verified and is allowed to
@@ -1815,6 +1842,14 @@ class PromotionFlags(BaseFlags):
         """:class:`bool`: Returns ``True`` if the promotion is redeemable by trial users."""
         return 1 << 6
 
+    @flag_value
+    def suppress_notification(self):
+        """:class:`bool`: Returns ``True`` if the client should suppress notifications for the promotion.
+
+        .. versionadded:: 2.1
+        """
+        return 1 << 7
+
 
 @fill_with_flags()
 class GiftFlags(BaseFlags):
diff --git a/docs/api.rst b/docs/api.rst
index 85dcf3ae6..c4189ad85 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -2048,6 +2048,7 @@ of :class:`enum.Enum`.
         The user is a Bug Hunter.
 
         .. versionadded:: 2.0
+
     .. attribute:: mfa_sms
 
         The user has SMS recovery for Multi Factor Authentication enabled.
@@ -2076,15 +2077,12 @@ of :class:`enum.Enum`.
 
         The user is a Team User.
 
-    .. attribute:: partner_or_verification_application
-
-        The user has a partner or verification application.
-
     .. attribute:: system
 
         The user is a system user (i.e. represents Discord officially).
 
         .. versionadded:: 2.0
+
     .. attribute:: has_unread_urgent_messages
 
         The user has an unread system message.
@@ -2093,11 +2091,6 @@ of :class:`enum.Enum`.
 
         The user is a Bug Hunter Level 2.
 
-    .. attribute:: underage_deleted
-
-        The user has been flagged for deletion for being underage.
-
-        .. versionadded:: 2.0
     .. attribute:: verified_bot
 
         The user is a Verified Bot.
@@ -2115,16 +2108,19 @@ of :class:`enum.Enum`.
         The user is a bot that only uses HTTP interactions and is shown in the online member list.
 
         .. versionadded:: 2.0
+
     .. attribute:: spammer
 
         The user is flagged as a spammer by Discord.
 
         .. versionadded:: 2.0
+
     .. attribute:: disable_premium
 
         The user bought premium but has it manually disabled.
 
         .. versionadded:: 2.0
+
     .. attribute:: quarantined
 
         The user is quarantined.
@@ -2137,6 +2133,24 @@ of :class:`enum.Enum`.
 
         .. versionadded:: 2.0
 
+    .. attribute:: provisional_account
+
+        The user is a provisional account used with the social layer integration.
+
+        .. versionadded:: 2.1
+
+    .. attribute:: collaborator
+
+        The user is a collaborator and is considered staff.
+
+        .. versionadded:: 2.1
+
+    .. attribute:: restricted_collaborator
+
+        The user is a restricted collaborator and is considered staff.
+
+        .. versionadded:: 2.1
+
 .. class:: ActivityType
 
     Specifies the type of :class:`Activity`. This is used to check how to