When you sweat prefusely in the butt area or you take a painful shit(crap) and It begins to hurt when you walk.
I sweat so much at practice my ass hurts and now i have "monkey butt"
by Blue pickle August 22, 2007

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Top Definition
on a hot summer day when you dont wipe your ass good after a shit and your asshole gets chaffed and then sweat mixes in fucking up your whole day
by urexcellency May 16, 2003

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when your ass gets so chaffed that it gets red, like a monkeys butt
by cream of some yung.. January 26, 2003

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A chafe recieved between the upper thighs and asscrack brought about by sweaty activities such as walking back and forth or working out of doors. Produces a Baboon-like rash on the buttocks.
"Man, I got a serious case of monkeybutt bartending tonight!" or "Landscaping gave the rudest monkeybutt yesterday!"
by Mick September 21, 2003

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Term used in the motorcycle world to define what your butt looks like after a long ride either on-road or off-road.
"Man, I am suffering from some serious Monkey Butt after riding that trail all-day long"
by Howboucha December 18, 2003

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Term of endearment: Can be used to describe a significant other or a loved one in a silly way.
I love you Monkey Butt!!
by I love erin :) March 02, 2009

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after riding a motorcycle all day and your ass hurts so bad you walk like a monkey
by Chris Anderson May 26, 2003

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