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The shape and size of young American male asses who do nothing but eat Cheetos and play COD all day.
Not a bad looking guy, but he has gamer ass.
gamer ass by onetrikpony August 15, 2016
A condition characterized by a numb rear that is typically sore after standing up.

Gamer ass typically occurs while sitting in a chair in front of the computer for prolonged periods of time.

Over time it is believed to flatten one's ass and, in extreme cases, can lead to a concave ass (or bony butt) as the tissue and muscle begin to degrade.

While gamer ass is typically associated with gamers, the syndrome can be experienced by anyone who sits on their ass for prolonged periods of time without getting up.
P1: "I swear my ass has been getting flatter... I don't know what's happening to me!"

P2: "You're getting gamer ass. Try doing something other than sitting in your chair for 12 hours a day until your legs go numb or you'll lose that ass altogether."
Gamer Ass by amethystbible June 27, 2023
The shape and size of young American men's asses from sitting on the couch eating Cheetos and playing video games all of their life. A sad state of affairs.
Not a bad looking guy, but he's got gamer ass.
Gamer ass by onetrikpony August 15, 2016
An ass that is covered with pimples and oily hair. You get this by sitting down a lot when playing video games.
Yo bro, have u seen Nicky gio and Warrens gamer ass? They must have plenty of hours on the game
Gamer ass by anonymous October 15, 2023

Gamer Ass Syndrome 

When the gamer's ass sweating way too much, so the chair starts to smell like sour cream & sour socks.

The smell often apply on the pants, even when the exposing time is low.
How do you clean a chair, that have been exposed to Gamer Ass Syndrome?
Gamer Ass Syndrome by Jyske Knejte December 19, 2020

gamer's ass 

When one sits on his computer chair so long, that more of the sitting on the chair will cause extreme pain and itchiness.
gamer's ass is a painful situation.
gamer's ass by 323215 April 27, 2007