+G - "soft caller id" mode - same as +g but automatically allows
anyone who's in a common channel with you to message you.
+w - Can see oper and server wallops.
+ ? +x - Has a cloaked host.
+o - Designates this client is an IRC Operator.
Use the /oper command to attain this.
* +a - Is marked as a server admin in whois.
MODE <nick> <+|-><modes>
-Usermodes:
+Usermodes: (? designates that the umode is provided by an extension
+ and may not be present on this server)
USERMODE DESCRIPTION
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+G - "soft caller id" mode - same as +g but automatically allows
anyone who's in a common channel with you to message you.
+w - Can see oper wallops.
+ ? +x - Has a cloaked host.
+B - Marks you as a bot in /whois.
+C - Prevents you from receiving CTCPs other than ACTION.
+D - Deaf - ignores all channel messages.