/bonk/, /oyf/
interj. In the MUD community, it has become traditional to express pique or censure by 'bonking' the offending person. There is a convention that one should acknowledge a bonk by saying 'oif!' and a myth to the effect that failing to do so upsets the cosmic bonk/oif balance, causing much trouble in the universe. Some MUDs have implemented special commands for bonking and oifing.
other jargon: