When a person (typically a hardcore gamer) has to use the bathroom, but instead, due to their hardcore gamer bladder, the urge disappears.
Bro: dude I just had a Gamer Bladder.

Me: bro that’s cool; get back online and help me do this mission.
by KarenDraws May 19, 2019
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Being able to hold your pee for long periods of time.

Gamer's usually hold it through a whole game then go to the bathroom.
John hasn't gone to the bathroom for like a 4 hours.

Dude, John has a gamer's bladder.
by Omgitsallama May 15, 2010
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