To Thwop,an action. The sound made when a male takes his penis and hits a random female in the head with it. usually used to signify someone that deserves being hit in the head by a dick.Can also be used as a sexual action.
Lets go out tonight,get hammered and im Thwoping every broad in there tonight.
To slap the living shit out of someone so hard that you leave a full hand print embedded on their face followed by a hard punch to the jaw or side of the skull making a loud thwop sound and ultimately leaving them unconscious