by Jenny Any Dots April 28, 2006

An FI is an an abbreviation for Fucking Idiot. You see these driving on the roads every fucking day. You can also find them in the workplace, in stores, and health clubs, police departments, and yes hospitals too. Most of them are men, but some are women.
That FI cut me off!
by Non FI May 30, 2014

what's his phone number? fo-fo-fi-fo-fo-fi-fo (445-4454)
by futuretrucker January 24, 2005

A sock or towel used in jacking off to eliminate hand to penis contact. Normally found in bunks in jail cells, boy scout camps, and tour bus bunks. They should always be handled with gloves or a stick due to the nature of the goo they normally contain.
by twistednick December 28, 2009
