Hungry Ass Mother Fucker (akin to BAMF for badass motherfucker)
Al: Give me some gum right now!
Brian: Ok ok, don't be such a HAMF!
A noise that mimicks a cat in that it is used to lighten the mood (be an "upper") or whenever there is emotion built up
Matt: "Haha, reer!"
Meena and Matt: =)