the sound when i'm smackin to mama's azz

to lightly hit or tap.

Past tense of being hit by a nonleathal device, such as a flyswatter, nerf gun, or newspaper.

hitting a person

The sound of your ball sac when it hits your girlfriend's hairy chin.

Past tense of thwap...thwap being a sound produced when the back of the hand makes contact with the chest/stomach area of a fully clothed person (when the thwapee is nude, it really rends to be more of a thmak) It describes a person who has just recieved a thwap.

The art of slapping one's package, balls and all, on a flat, hard surface. i.e. your co-worker's desk