Having the qualities or attitude of a Bad Ass Motherfucker.
Samuel L. Jackson displayed his BAMFitude in reciting Ezekiel 25:17 before killing people.
Mark Wahlberg's inner BAMFitude was evident when he shot Matt Damon in the Departed. (Sorry about the spoilers, but it's for a good cause)
Verb, noun
To kill someone in a first person shooter video game in multiplayer, immediately after said player has re-spawned, in a similar way to how a bear kills a salmon after spawning upriver.
Oh man, I just got salmon killed!
Hey sorry about the salmon kill Swarley...