Sandy Turd Flex (STF)

When you're taking a dump and your butt flexes forcing the poop to retract into your butthole causing the sensation of sandpaper going up your butt.

"Man I hate it when I have a sandy turd flex (STF) in the bathroom"

by Matt Stazjic October 3, 2016

Flex rex

When a guy flexes his dick to make it bigger.

yo did you hear about Dave pulling a flex Rex

by Camoflame88 May 27, 2016

Avon flex

A chinese person who thinks that they are cool so they put shitty tatoos and sing shitty raps.

"Omg! Is that Avon Flex, fucking fag"

by Aig group May 12, 2016

Sumo flex

To brag or boast about your personal belongings or accomplishments

Man Keaf just got a new Rolex he was on Snapchat sumo flexin

by BlatlanticK ReKords May 5, 2018

flexing a pop

Flexing a pop

Be back in minute just flexing a pop.

Why did you take so long? Sorry I was flexing a pop.

Do you have a toilet? Need to flex a pop urgently.

by HeavySoss December 7, 2019

Flex Tape

A weapon used to gag your enemy or strangle the by wrapping it around their neck.

I sawed this boat In half! Flex tape is keto

by NavyGarlic December 21, 2019

Flex

A way of making your friends jealous of your new AirPods

Random person 1: Oh hey guys.. I got some new AirPods, I can listen to music with GOOD QUALITY now!
Random person 2: Ugh why the fuck are you flexing

by itsarga January 21, 2020