To Boot

To kick.
To put boots on, especially for riding.
(colloquial, Canada, US, usually with it) To step on the accelerator of a vehicle for faster acceleration than usual or to drive faster than usual.
To apply corporal punishment (compare slippering).
(informal) To eject; kick out.
(often with up) To start or restart a computer or other electronic system; to bootstrap.
(computing, informal) To disconnect forcibly; to eject from an online service, conversation, etc.
(slang) To vomit.
(MLE, criminal slang) To shoot, to kill by gunfire.

The more common term for “to eject from a chatroom” etc. is kick.