A guy in a group of friends who always falls on the grenade the grenade. A flak jacket provides protection from grenade shrapnel to the wearer in real life, while a figurative flak jacket protects his group of guys from getting grenades. A flak jacket is not to be confused with a wingman a wing man is usually a relationship where all guys are on equal terms and take turns wing-manning for one another, however a flak jacket usually has less game than the other guys so he is almost always willing to take the grenade, because he can't get other girls. A flak jacket is a great friend to have because it can protect you from potentially lethal grenade shrapnel while flirting with chicks.
Friend #1: Hey man look at those three chicks over there, I got the hot blonde with the big tits.

Friend #2: Fine I got the fine latina chick with the awesome ass.

Friend #1: I guess that means you got the pig faced chick man.

Friend #3 (flak jacket): Fine if you say so, I guess Im falling on the grenade again.
by jdazzle217 September 8, 2011
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In Unreal Tournament, what experienced players call newbies who favor the flak cannon. It annoys them, because they learned long and hard to aim like bots, and with this weapon it's possible to win a matchup just by knowing where the enemy will go next.
It is then implied, that aiming were the highest of all gaming skills, and thus it'd destroy the game if you can make points without it. Ironically though, any simple bot can aim like a pro, predicting where an enemy will go next is beyond the abilities of any UT bot I know of.
(Team Deathmatch) Yeah we lost, but that's just because you're all spamming newbs and flag monkeys.
by Peter Shaw June 7, 2005
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Something you use to blow up your Soviet, American and British neighbor's house in Call of Duty
Once James took the Flak 88 and blew up Vasily and Gordon's house in Multiplayer
by the ww2 master November 14, 2018
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A perk in the Call of Duty series. This perk has only been used in Call of Duty: World at War and Call of Duty: Black Ops. It reduces explosive damage.
Damn, my grenade didn't slaughter that guy because he had Flak Jacket as one of his perks.
by MW2 Freak January 3, 2011
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when you did something and now all of your friends are throwing shade but you are catching flak.
Man I'm catching flak after missing that three pointer
by Here come dat boi bucky May 18, 2017
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The cool way to say flaccid...whenever something is floppy!
"Aw, MAN...I got a Flak'Sid snow pea!"
by TheGeorge June 10, 2005
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The mountain of fat that only obese women have in between their vagina and chin which blocks a man from being able to pull out of said woman and cum on her face
I wanted to finish on her chin but she had a Virginia flak-jacket so I couldn't
by Spencer Ace August 26, 2019
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