(Grenade, hand, stun). a less lethal grenade used by US police, as well as special forces the world over. Typically such grenades deliver 9 ear splittingly loud bangs and blinding flashes, which come half a second apart. These grenades stun and have a seriously immobilising effect. (From experience) your head seems uncapable of functioning, you cannot see strait (if at all) and you can hear nothing but ringing. The effects last a considerable time, and leave you with a banging headache. In a situation of use, such grenades would be tossed into a room to "prepare" them for a hostage rescue clearance.
a flashbang is tossed into the room.

B A N G !!!!!!!!!!!!!!!!!

Very very very loud, trust me! The occupants of the room are stunned and find themselves unable to do anything.

Then a four man assault team takes any terrorists prisoner or immobilises any firther threat before lining up the hostages for search and check.
by the gray man. June 3, 2006
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a grenade used by special police units that produces a blinding flash

also having sex for a very short time, more commonly known as a "quickie"
by Purpliction April 26, 2003
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To flashbang someone is to take off your mask in front of them and they gag at how ugly u are
Guy 1: This girl flashbanged me 😭😭😭
Guy 2: tuf shit bro
by fl7ght March 12, 2022
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"Stun Grenade" or "Flash Grenade" used by law enforcement. Combines a flash of light and a loud noise (imagine that) to startle, immobilize, or stun an enemy as the team makes entry.

It's also the grenade in CS that makes your screen go white for a full second. Desired use is associated with room clearing and pwning the other team, so why are my teammates the only ones who ever seem to use them on me?
I totally flashbanged my team and it won the game.
by An Asshole October 6, 2003
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When your stupid fatass GUY friend lifts up his shirt to show his boobs.
Mason flashbanged us at lunch today.
by Revzzzz March 5, 2015
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1. ) Sneaky maneuver derived from Call of Duty 4 (flashbang grenade).

Cum in a female's eyes and then swiftly smack her square in the ear. She will experience a flash of white followed by a ringing in the ears - similar to the effects of a flash bang grenade.

2.) pre-ejaculation
-Sarah was asleep in my bed so I burst in and gave her the 'ol flashbang.

-She was giving me head then I finshed with the flashbang.

- I put it in and it was over...it was a total flashbang man...
by CODfish08 April 28, 2009
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when you get so drunk, high, or otherwise intoxicated that you can no longer see or understand what is going on. However, you are still able to get extremely lucky and sometimes score.
Dude, I was so flashbanged last night but I still scored with Emily.
by SammyDSAE March 14, 2011
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