Schapepp 

To forcefully slap someone in the face with your penis without them expecting it.

"If you puke in my car again, I'm gonna schapepp you right here in front of everyone in the Taco Bell drive-thru."

Schapepp by LostPuma August 28, 2007

schapappy 

the act of smacking one's dick across another's face; a violent, cude, lewd and lascivious act; an exclamation made at, during, or about such acts.

He gave her an Italian Awakening, and yelled "SCHAPAPPY!!!"

schapappy by CobaltNova March 9, 2003