flex couple

A couple whose gender roles are unfettered by tradition, societal judgment, or physiology.

An individual in a flex couple is a "flexeur."

first world flex

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.”

flex-texting

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