2. First. Outside. Inside. Last (A rule for binomial multiplication in mathematics.)
3. A thrusting weapon used in fencing.
4. In Australia, a foil, is a $25AUD deal of weed.
5. A $20nzd deal of marijuana wrapped in tin foil,around 10grams. Also refered to as a tinny.
2. You want a math example? Seriously? Give me a break.
3. He scored a point by putting the point of his foil on his opponent's torso.
4. "Do you sell foil's?"
5. "Yo, do you know where I can score me a foil?"