When a male skips showering for a week, then takes his dirty, salty, sweaty ball sack, and lays it flat on the victims nose.
Shmaff is a label that will stay with a person for the rest of their life.
Did you hear who George shmaffed at the party last night?
Get yourself ready, its time to shmaff him.
One who smells the stench of ass but throughly enjoys it, thus giving him an erection and causes him to stick his stiffy in a bowl of scolding hot velveeta cheese reducing the raging boner back to its natural flimsy state.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.