an adventure, escapade, or other opportunity involving an unexpected sexual encounter whether its during a casual hook-up, or within an actual romantic relationship.
son: what is considered rape nowadays?

father: a non consensual, illegal, immoral, amoral, and one sided (in the guy's favor) flash-bang. I don't give a rat's ass whether it's the correct legal definition, that's for the State to decide, but there you go, that's my definition of rape.
by Sexydimma August 20, 2012
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v. to fuck someone most vigorously and rapidly, as if one were The Flash.

n. a nonincendiary explosive which creates a concussive blast of sound and a temporarily blinding burst of light.
Henry: Ha ha! I got you with my flash bang!
Chris: Oh yea! *bumps into a wall* Well I flash banged your mom last night!
by Aktopus December 7, 2004
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A grenade that blinds you and makes you temperarily deaf. When thrown on rainbow six 3 it is usually followed by " WATCH OUT YOUR EYES "
" Watch out your eyes!"
" Ah FUCK YOU Drewpeacok "
by bob long March 6, 2004
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Loading gay porn on a device and throwing it into a group of unsuspecting males while yelling "Flash Bang!"

A humorous way to prank your straight friends by exposing them to gay porn
I really got those guys at the other table with that flash bang I threw at lunch.
My friend hit me with a flash bang.
by Chrispyboi69420 October 23, 2018
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When you masturbate in another room till you almost cum. You then call your girlfriend or wife into the room. Upon her entrance, you cum in her eyes, thus blinding her. Once done with that, you slap your dick on her ears, thus deafening her.
Guy 1: "I gave my girl a flash bang last night."
Guy 2: "How did that go."
Guy 1: "Allow me to answer that with a question. Can I sleep at your place?"
Note: Will usually end with one angry girl.
by Gamer117 December 12, 2009
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When a girl flashes a guy, then gets banged by beformentioned guy.
"I wanted to get his attention so I Flash Banged him."
by KindlyFuckOff November 4, 2019
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Noun: The act of a group of strangers spontaneously engaging in sexual intercourse in a public place with lots of foot traffic (EX: train stations, plazas, airports, malls, parks). Such events are actually planned but appear spontaneous to anyone who not involved in it's planning. It should be noted that the organizers of Flash Bangs are typically very welcoming should anyone want to take part.

(Verb) Flash Banging: The act of taking part in a Flash Bang

The current record for largest Flash Bang took place with 28 people in the Smithsonian National Air and Space Museum.
Person 1: Hey did you did you take part in that Flash Bang in Central Park?

Person 2: I did! It was a blast!
by Supposedly_Bacon May 30, 2020
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