bamf

exclamation1

1. •
   (Internet) Signalling a user's disappearance from a discussion, chat room, etc.

noun1

1. •
   (slang) Acronym of bad-ass motherfucker, a very tough or formidably impressive person who is not to be trifled with.

   • And -atttitude-^([sic]) is a big part of being a BAMF, too. — 1997