keyboard flexing

Someone who 'gives it the biggen' over text/message but cant even confront his mum about his lack of pubic hair.

"Was there 'beef'?", asked barry. "No barry, Samuel was just keyboard flexing", chuckled paul.

fat flex

A very hard flex that has an effect on people so strong they could end up dazed and confused

Damn man, he hit us with a fat flex when he walked in with the Gucci sweater and got two girls at once.

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

Not to over-flex

(original: Nepřeflexit)
verb
1. careless activity; do not exceed the literary maximual limit of Flex
2. the eleventh commandment; "You will not over-flex in front of the fellas, since the God of flex would punish you."

Guy1: "Dude, that was just so easy. First try bro, i don't know what was supposed to be the challenge here.
Guy2: "Be careful not to over-flex tho...
Guy1: *Fucks up in a spectacular way*

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"

had to flex

Had 2 stunt on them hoez

Sorry bro....had to flex

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'