1.) The
art of buying a Mcdouble at McDonalds, going to the bathroom, splitting the sandwhich, jizzing on a patty, and going up to someone whacking them in the face with both ends of the McDouble.
2.) When A male gets a
casual Handjob in McDonalds from a random female.
Originated In State
College, from the Classic S.S.F.
1.) "Oh my God, Leanne just got a McWhack-Attack from that guy in the
panda suit!"
2.) "Every
Friday, I got to McDonalds SMASHED at
3 in the Morning and get a McWhack-Attack from all the prostitutes.