Monkey Butt is a slang term used to describe a rash that people may get on their buttocks or inner thighs. It is usually caused by sweat and poor hygiene and is characterized by an itchy and red rash. Other symptoms include a stinging sensation, small bumps, and flakes of skin.
The rash can be treated by keeping the area dry, cleaning with warm water and soap, and applying a cool compress and topical creams.