Skip to main content
Simply when one has a flat ass. Hence Flass.
That girl has quite the Flass!
Flass by Roy Michin May 18, 2015
Related Words
Having a small butt
She's gotta flass dude..
Flass by Salmontiddy December 28, 2016
She has a flass.
Flass by Hshshgsgdgdhdh February 20, 2015
The way that flabby person on the block goes off on you for the littlest thing, shaking their head back and forth, getting all up in your face and pointing their grimy fingers right at you as they proceed to spit on your face by yelling; their sass is just as extra as their flab
Guy1: "so I was in McDonald's and this woman was standing there for a good 5 minutes trying to make up her mind. I knew what I wanted so I walked in front of her to order when they said 'next please'. Then that bitch proceeded to go off, getting red in the face and making me smell her nasty ass breath. She caused a huge scene over a simple mistake."
Guy2: "Well bro, be happy you made it out alive cause that bitch could have suffocated you with her flass."
Flass by Tayray467 May 31, 2018
When you floss your teeth with hair you acquire whilst eating ass.
I only had time to eat ass or floss so I flassed
Flass by Tastygumdrops March 6, 2015
n. 1. an idiotic or lazy person who has not lived up to expectations. 2. some guy who is a disappointment. 3. originating from “flaccid,” flass refers to a person who cannot get an erection. 4. a big sweaty geesh hole
vb. flassing, flassed, flassing-out, flassed-out 5. to not get involved 6. to be absent at the annoyance of others. 7. to have your manhood sagging lifelessly at the opportune moment.
adj. flassy. 8. without interest or enthusiasm 9. sluggish; inactive; droopy; languid

flastic, flastic-modulus, flassability
Due to other commitments keeping him out of town, Adam was branded as a massive flass by his house-mates.

Through ridiculous amounts of flanging around Taz’s highly flastic personality converted to a flassed-out phallus.

Franco is such a flassy flass!
Flass by TLJ May 16, 2007