The act of an aggressive woman (most likely a lesbian, or Karen), in which this person will proudly demonstrate their innate ability to turn up from 0 to 11, and verbally, sometimes physically to assert themselves over those they perceive as someone who is not worthy of their respect.
"dude, did you see how that butch looking chick just got in Chad's face?"

"Yeah bro, that was the ultimate clam flex"
by Oafhunter December 8, 2021
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A couple whose gender roles are unfettered by tradition, societal judgment, or physiology.
An individual in a flex couple is a "flexeur."
by lengler December 18, 2013
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When you want to brag, but you don't want to sound like too big of a douche.
Guy 1: "Aye homie. You ask out that G yet?"
Guy 2: " Man I took that trash OUT!! No Flex though."
by Not John Doe April 10, 2015
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Lying or "enhancing" aspects of you life to impress opposite sex
This guy was totally flex-texting me! Talking about business he owns(works for uncle), car he owns(belongs to baby momma) etc
by therealtriciaj July 10, 2015
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Also known as “rich people problems”, a “first world flex” is essentially a first world problem, but one that’s simultaneously boastful as well as whiny and arrogant.
“Yesterday Phil was complaining about how he didn’t know which camera he should look into on his new iPhone 11. I fucking hate him and his first world flexes.”
by face of mars November 18, 2019
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