Skip to main content
A contraction of the words "flaccid" and "ass".
Wayne inherited his mother's flass.

I looked up from rolling a joint and saw Catarina's flass flapping in the wind.
Flass by KangDuc January 14, 2009
Related Words
When you're scratching your ass and find a stray hair, and as you pull it out you realize it's actually in your arsehole, like floss, but up your ass.
It was so embarASSing when I yanked that flass out during my threesome with Earl and Lorlene.
flass by Millergirl601 November 29, 2006
To floss someone's posterior crevice. See "flassing."
He seriously needs to flass; his BO is unbelievable!
That dude smells like flass, he hasn't taken a shower in forever so he sprays on some of that trusty cologne. Now he smells like flass
Flass by treez1976 September 9, 2015
Another word for a flat ass; mostly used when caught staring at someone with a flat ass.
Guy: were you just staring at her ass? Guy2: pfft. No that's flass
Flass by Big Chicken Noodle September 21, 2016
Flass refers to the unfortunate condition of encountering an individual who embodies dullness, annoyance, and a general lack of enjoyment in conversation.

A person labeled as "flass" tends to drain the energy from social interactions, making it a challenging and uninteresting experience for those around them.

This term encapsulates the essence of someone who is not only boring but also exudes an aura of annoyance, making them less than desirable company. When confronted with a case of flass, one might find themselves longing for more engaging and lively interactions.

Origins: flaccid
"After spending an hour with that dude, I realized he was the epitome of flass – every topic became a boring monologue, and the once vibrant conversation turned into a tedious ordeal."
Flass by Not Flass Guy January 18, 2024