Short for "Counterfeit", term "Fit" is only used for counterfeit money that sells for less than the legal value it resembles. Fits are also known for great quality, but just a bit lower than the actual authentic bill that money is made of. And is used to actually purchase things.
Dude i needa buy me one of em gucci bags for my boo, cost around $250, link me fits to buy 6 of em. I'll pay the producer after i sell em and link one to my boo, seen?