flex a nut

To undertake extraordinary measures to accomplish a task

It's gonna be hard to get with her, because she's married. But she's so fine I'm going to flex a nut to make it happen

Flex nuts

While often used derogatorily against others as an accusation of hyper masculine overcompensation, when used in the first person it indicates a willingness to forcibly overcome an overwhelming challenge or highly favored opponent through the use of ones ego.

Mike always trying to flex nuts around school but nobody scared.

Don't matter how many friends you bring, your whole little Gaggle of followers can eat shit. I flex nuts son. Come at me.