Noun.

A Clan on Xbox live comprising of Hackers and Trolls. An overall less than average clan with the exception of hacking.

Adjective. (F.L.E.X.er(s))
Used to describe malicious players in Call of Duty: Black Ops, or other Xbox Live compatible games.

Verb. (F.L.E.X.ing)
Showing off how good you are at Hacking and Trolling in the above-mentioned Games.
N.
"The F.L.E.X. Clan is full of cheaters!"

A.
"John McCain is quite the F.L.E.X. er"

V.
"Hobowner loves F.L.E.X. ing"
by Purebro69 December 29, 2010

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Top Definition
As far as urban slang, the definition is "to show off." Used by many rappers, most notable Ice Cube and the Geto Boys. Originated in the urban community, and has been used for quite some time.
"...no flexin', didn't even look in the nearest direction as I ran the intersection. (This is said because Ice is trying to get away from some people who tried to kill him the other day In the song, of course)" -Ice Cube, "It Was a Good Day"
by The Boston Rag February 27, 2005

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Adjective: To stunt or show off used by many rappers in various songs.
I ain't gotta flex, boy I got it, ooh, ooh, ooh, ooh - Rich Homie Quan
by TrapKingzofIslip August 08, 2015

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(Verb) to put up a fake front.
"Man you see all you guys are so fake, yall be flexin!"
by SirEli April 29, 2010

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Also used to describe someone wearing something.Sometimes proudly to make it seen.
(2 men in the mall)
Man1:I got my new Aj jacket man
Man2: Yo your tryin to flex that jaket man
by andre.. February 23, 2005

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A substance added to street drugs to increase the weight of the product, allowing more profit to be made, but in return, usually taking away from the drug's original potency and lowering it's side effects.
"He used too much flex. I didn't even get high."
by Nah Uh July 09, 2015

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A person who, unlike Bisexual, can only have sexual relations with one sex, but can love either sex. Short for "flexible" or "flexamourous".
Guy 1: Hey, did you hear about Daniel and Samantha getting together?
Guy 2: No way! But I thought Daniel was gay?
Guy 3: He's a gay flex, not gay.
by Person12743 September 06, 2016

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To lie or Bend and flex muscles; To lie and say you have something when you really... Don't. Fame, Instagram followers. ; to bend and push out muscles
Bruh, you flexin' mad hard

You like the way I flex my arms
by fruitofthelome March 10, 2015

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