Origin: West Coast of the United States

Background: The term derives from the process during love making in which your testicular sack creates contact with anus cheeks making a continuous slapping sound signifying that you are getting the most out of your pumps and doing an outstanding job laying pipe.

Meanings: Very Good, Hard Hitting, Great, Top Notch

Gone. Drunk as hell. High as hell. Under the influence of something.

To have a very loud, good quality sound system esp. in your car. Or a song that just sounds hella good and has tremendous bass in it. I have to set the record str8 once again. We started this in the Town, Oakland, Ca, USA. When everybody else was still callin it "Knock" or "Thump" We in Oakland started calling it "Slap". The rest of the Bay Area eventually caught on to it. Str8 Up!

The sound that occurs when being slapped across the face by a big penis. Usually the head of the person being exposed to the slap slap will move from right to left during this procedure.

Stickers containing graffiti usually taken from the post office. They are usually slapped onto walls, street lights, etc.

Music that makes you want to turn up the volume ALL the way (CRACKIN music).