flexing dominance

To intimidate a rival bro passive aggressively by commenting on an Instagram picture.

I was flexing dominance at someone... Someone named Steven.

flex a grumpy

To take a shit outdoors

That burrito is kicking in. I'm fit to flex a grumpy.

forehead flexing

When you flex your forehead muscles, like when Arnold Schwarzenegger screams anything.

Arnold Schwarzenegger forehead flexing while saying "IT'S NOT A TUMOR"

Flex-Mas

When one shows off - flexes - there christmas gifts within the next week after christmas.

S "shit man nice jacket, shoes, hat"
K "yeh man xmas presents'
S ' ahh standard Flex-mas'

flex flexington

Someone who shows off all the time or flexes about things in his or her life

HaqL is a flex flexington because he flexes every shot he hits

flex stop

When you cross your legs and flex your butt muscles together to hold a dump in because your anal sphincter isn't strong enough.

Dude I had a close call this morning. I broke into a shuffle on the way to the bathroom and had to pause half way to do a flex stop.

flexing and flashing

acting out & or showing things in a continuous reckless matter without an effect

hey Walter is over there with his gun! don’t worry he’s not gonna do anything he’s just flexing and flashing