/action target message...

IRC command, short for /CTCP target ACTION message...
In some clients the name of the command is /describe.

This command works just like /me, but it can target other places besides the current channel. This way you can "pose" for other users too.

/action WWWWolf is bored of the stuff you've written
would be displayed on my screen as:
* YourNick is bored of the stuff you've written