Any simulated vagina, homemade or commercial.

Prevalent within death row inmates, a hands-free masturbation device made up of a dirty old sock, vaseline (or toothpaste, if not available) a toilet paper tube (if available), wedged firmly between a matress.

fifi is a latex glove wrapped by a small towell or sock inmates wrap the towell or sock. you can make your fifi tight to simulate a tight pussy by using rubberbands around the towell. insert some cream in the glove maybe some warm water. now just pretend your boning some fine ass chick and hurry before the guards bust you.oh and never use shampoo unless you want your penis to blow up and all your cell mates to laugh at you

Pronounced "fee-fee". A slang term for methamphetamine made popular by the slang master of the Yay Area, E-40.

Fuck it, Fly it. It is used in the aerospace industry when something is working right, but you want to use it anyway. Usually due to tight schedules or irresponsibility

Commonly referred to as the "house centipede," this freakishly large and alarmingly fast bug can be found in any basement in North America, entering one's house through the drains.

It is known that Fifis like damp areas, so if one leaves a pile of towels on the floor after showering their basement, they are certain to find one. Fifis also run towards you to hide in your clothes, which is probably the worst part.

The Fifi has a disgusting number of legs and antennae, which makes it *almost* resemble something cute and cuddly, hence the ironic name "Fifi."

Acronym: F@ck it, Fly it. Used in military aircraft squadrons when one who does not know if a discrepancy causes the condition of the aircraft to be grounded or is flight ready.

Female of the human species, (see female). Originated in Chicago, Illinois sometime in the past 100 years.