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a fraternity trick where a pledge is blindfolded and order to perform sit-ups. Once the sit-ups have commenced, someone puts their bare ass in the sit up path so that the pledge gets a face full of brownie.

see also power sit-up, shit-up
Dude, Scooter just gave Tay-Tay a reverse brown bag! It was fucking hilaious!
by jorns March 17, 2004
A person with a highly attractive face and hair but very unattractive body. The term is derived from the opposite of a Brown Bag. Synonymous with Reverse Butterface.
"I thought that girl was hot from a picture of her face. Turns out she was a reverse brown bag."
by peadeyedblacks September 01, 2008