C Slap
To use a Cock (penis) to slap a person in the face
Don't make me C Slap you!
C Slap
Also, to slap someone's cock with one's face. This is derived from Einstein's Theory of General Relativity.
Wait... did she C Slap you? What a bitch! You should give her a White Christmas.
c-slap
To use one's penis and slap someone across the face with it. Usually its a girl getting slapped when she sucks the penis improperly.
guy 1: nicole last night gave me a horrible blow job.
guy 2: oh did you c-slap her?
guy 1: yep across the face.
guy 2: oh did you c-slap her?
guy 1: yep across the face.
C-Slap
To cum on your hand and slap someone in the face with it!
Man, if she doesn't shutup, i'm gonna C-Slap her straight across the face.