This is a word used when someone else does something stupid. When the person does something stupid, you put your hand on his/her neck and slide it off fast, or if someone does something really stupid you give them an uber fifs, when you include some fingernail in your fifs and that makes it hurt a little.

To play a game of FIFA.

Short for "Fake Internet Friend"

Typical Marijuana

A way of shortening the band name "Five Iron Frenzy"

F.IF = Fart Induced Fit. The mad flailing of arms and nose pinching that happens as soon as a fart is smelt by the person unfortunate enough to be in the room when somebody else farts.

When you count to five, you dont say, 1,2,3,4,5. You say, one,two,three,for, fiffffffffffffffff. So you plead the FIF Amendment. Or you will be home October FIFFFFF.