A sexual act in which a couple is having anal sex. It starts with the male riding on his girlfriend’s back like a horse and hollering, “YEEEEE-HAAAAW!!!!” while his dick is still in her turd-filled ass. Then he whips his dick out of her butthole and drums on her buttcheeks like a set of bongos until she projectiles a massive shitload all over him and the bed.
Kyle gave his now ex-girlfriend Taylor the ol’ classic boom-boom. He pounded the living shit out of her buttcheeks so hard that she shit all over his legs and the bedsheets and now he won’t go out with that disgusting cunt anymore.
by rosenovarocks August 10, 2021
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Constant penetration (usually done with one's penis) into any opening of someone's body
by Geoff February 22, 2004
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Having a nice body or something that a man( or women ) would be like to see.
I got the boom boom that you want.
by Mandie December 28, 2004
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exclamation when you are pleased or to show off
Boom. I just won our netball match.

I beat you. Boom.

Boom. I win.
by booties69 November 15, 2011
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An exclamation used to define / draw attention to an excellent outcome. Can be used without any preamble. Typically accompanied by suitably emphatic hand / arm gestures.
"I just made the most awesome dinner - boom!"
"Check that backflip - boom!"
Walks into room wearing new shirt - points to shirt "boom!"
by Jack Union May 02, 2013
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