the act of using a clip of any sort to shut close a bag of snack food. and then immediately proceeding to erupt in imitation monkey noises.
"MAN dawg, last night i got so cRUNK. i Crimped it AND chimped it."
"oohoo OHOOHOOHOHH OOO OOO O O O O OOOOoooOOOooOOO."
"yeeeaaah dude, crimp it and chimp it."