A thunderclap is the sound of a scrotum slapping against the body when going balls-deep
I went balls-deep with Deedra last night. So you gave her the ol' thunderclap
by TSUAOJAP April 15, 2010
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When two lesbians run from opposite sides of a bed, jump kick into the air, and scissor slam vaginas hard as fuck.
Two lesbian ninjas would be ideal at thunderclapping.
by cjM March 12, 2015
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The name given to the slapping sound produced during the act of sexual intercourse in the famed doggy style position when a males testicles, which are especially loose and/or saggy due to heat or over stimulation, smack against the back of the females thigh and produce a slapping sound reminiscent of a soft clap of the hands.
Man 1 "Nigga i was bangin my girl the other night doggy style and my balls were so loose that the sound of the thunderclap was proper so loud that i went deaf in my left ear."

Man 2 "Shit nigga you best calm down on swingin dem testiclots around."

Man 1 "Word."
by Ninja Mc Stealth Kill August 23, 2009
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The act of gradually shaking and vibrating the bum until the cheeks smack together in a thunderous clap.

Usually and most easily acccomplished by women with large, saggy booties.
I wonder if Shaquanda can do a thunderclap?
by nearperfect9 June 10, 2004
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An oral sex act that involves cunnilingus whilst being slapped repeatedly by her thighs.
Hey man have you tried Thunderclapping? Me and my girl tried it, I went deaf!
by MilkyBarKid15 February 14, 2015
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The action in which the male ejaculates onto the palm of his hand and then slaps his partner in the face, creating a loud clapping noise.
Man, when I got done I gave that girl a thunderclap and showed her who's boss.
by DJ Stymie August 11, 2006
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The act of shaking back and forth vigorosly to the point where your balls hit your gouch making a clapping sound
yo all dis thunderclapping is starting to hurt my nutsack!
by ayna September 2, 2007
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