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.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.