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1.
a term used to describe fat chicks that wear really tight clothing at bars, pretending to be hot. Never mistake a swamp rhino for a hottie.
"Check out the swamp rhino over yonder. She's a thick burger with extra mayo!"
by C-Dirt January 21, 2007
 
2.
-A swamp rhino is a guy's junk when his balls are sweaty and wet and he has a raging boner.

-Also a rather unattractive obese or overweight woman in too tight, unflattering clothes at a bar, usually kind of sweaty due to the layers of fat + tight clothes + clumsy, drunken dancing.
"That guy had a fucking swamp rhino in his pants, nasty!"

"That bitch is a fucking Swamp Rhino!"
by twinkletits November 17, 2013