Used to temporarily ban someone from a channel. Only works on IRC networks that use InspIRCd and have the m_timedbans module loaded.
Pipes your messages to a bash shell or whatever shell you have and returns the output to your window. No messages are sent to the IRC server when it is active.
Pipes your messages to an executable file as a single argument. Returns the output of the script to the channel you are talking in. Use this to annoy your friends or something.