Foils

An individual package of heroin wrapped in foil, usually of a 10$ value. Foils are sold on the street and through drug dealers. Usually yields 3 to 4 decent-sized lines, providing your dealer isn't a fuck..

"dude, I am fiending hardcore, do you have any more foils?"

by Matt December 5, 2003

foil

First. Outside. Inside. Last

Foil gives me great pleasure in multiplying binomials.

by Omikron October 2, 2005

foil

A thrusting weapon used in fencing.

He scored a point by putting the point of his foil on his opponent's torso.

by The Professor November 7, 2003

foil

In Australia, a foil, is a $25AUD deal of weed.

"Do you sell foil's?"

by Diego July 26, 2003

foil

(v.) To publicly humiliate or embarrass someone. To prove someone wrong in an embarrassing manner. Synonymous with "own" or "pwn."

HP really foiled Falc by posting his gigantic rambling love letter to her for everyone else to see on the internet.

by dantehicks3737 February 14, 2005

Foil

Stands for First Outer Inner Last

A math acronym used for multiplying binomials.

This is known to the world as the best math operation known to man. It is by far the most useful, this is a scientifically proven FACT and should not be disputed by anyone, ever. Doing so is punishable by death.

Courtney - "Did you hear the Bobby does not like to FOIL?"
Abbey - "He should be killed, because that is punishable by death..."

by Steve Perry! January 30, 2012

foiling

when two guys poop into each others butthole, a type of fetish

larry and robert love foiling with each other

by robbieboy77 June 26, 2009