Top definition
A sexual position. A man or woman coats their hand and forearm with napalm, and then sets it alight. After this they then yell out "FALCON FIST!!!!" and proceed to fist a female in her vagina. She must be a firecrotch, or this could become dangerous.
Peter Parker: Yo, I totally Falcon Fisted MJ last night!
Harry: No way! Do the carpets match the drapes?
Peter: Yeah, luckily...if she wasn't a firecrotch she could have been pretty badly burned.
by Cockdriller April 05, 2010
Happy St. Patties Day!