when a male swings his junk between his legs fast enough to produce a "slap" sound. The maneuver is most effective in a North/South fashion. East/West will do, but it's not as loud and hurts your balls.
Synonyms for the slap
On this page, you will find 30 slang terms related to the slap. Some of the top words include: Ringing Big Ben, Pap, pajowah, Spaf, shit-nuts, and 25 more.