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1.
During a blow job, the man pulls out his (big) cock and smacks the girl in the face with it
John: I got head last night!
Frank: Awesome, from who?
John: Brittay, I was cock smacking her too!
by Dumby August 03, 2007
 
2.
Cocksmacking is another word to mean gay sex.
Jerry is probably busy cocksmacking with some other guy.
by iminabox March 05, 2006