Gymwhale 

Gym whale is a a gym clothing line specialises toward the physically challenged, and by physically challenged I mean fat lazy fuckers, it is an off brand of gymshark

You, that fatty would definitely be wearing gymwhale

Gymwhale by Intheboghole2 May 29, 2018

Gym Whale 

When he/she is an avid gym attender but look like a fat fuck.
Also often wears gymshark clothing.

Harrison is a humongous gym whale

Gym Whale by Stiff Daddy 66 April 17, 2023