A sharp rapping with the palm of the hand on the back of someone's head. A thop is commonly used when the thoppee has said or done somethingillogical or stupid, or it can be used as a threat.
Replaces the word "Though, Tho, thop', or any connetation of the word." Also it can be tag-a-longed at the end of any sentence or word and make perfect sense, not to even be questioned.
Also it may replace a word that may seem obvious to its actual meaning.
Man you got so jeff'd last night, not as bad as miles thop.