A term started by the east coast bloods, or United Blood Nation. This refers to getting cut across the face, therefore needing 150 stitches (buck fitty.)
A little sub sandwich stand in Westwood, CA near UCLA that used to have sandwiches priced at $1.50. Since then the price has risen quite significantly but the locals still call it "Buck Fitty." Its usually open really late with a lot of drunk people around it.
A newfoundlandish slang term for travelling past the point of speeding and hitting a moose at 150 kpm and peeling open the roof of your car like a can of sardines