a man or a woman who participates in a threesome with two other sex partners be it two men or two women or one of each, and licks them both at almost the same time, licking one and then the other, back and forth.
by Non FI August 07, 2014
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
by Non FI August 07, 2014