The act of hitting someone over their head with your penis during oral sex.
I Smurf clubbed that bitch!
Okay this guy is generally right, except that the smurf club is hitting the girl (or guy) with your semi-erect penis, in a sort of swooshing ninja motion. Any bruises incurred can act as mementos of the act. Background unknown. Also called here (in scotland) a Jack Slap.
My mate Augustin gave his girlfriend a good smurf club!