by metal gear ray June 24, 2005
by t barber February 28, 2006
by NinjaPleaaasssee April 14, 2011
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.
His penis was so big that I could literally hear a "slap slap" while he was hitting my face with it.
by _crush_ August 17, 2009