Describe
From Scriptwiki
Sends an action to the specified target.
/describe <target> <message>
- <target> can be either a nickname or a #channel.
- <message> is what the target will receive as action.
Example
/describe #help.script moos
Sends 'moos' as an action to #help.script.
See Also
/describe will send an action to the active window.