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1.
Someone who sweats so much, it would be visible under water.

Or

Someone who can not be bothered to join in a type of activity.
Look at your onion rings? Your such a sweaty fish!

Or

Ashlea, get out of bed you sweaty fish, and come out!
by Marlow August 09, 2007

Words related to Sweaty Fish

fish gurner hot lazy minge onion rings ravers sweat twat