Definition: "Foot wedge" is a slang term for a "club" that helps a golfer cheat his way out of trouble. Specifically, "foot wedge" is what a golfer uses when he kicks his ball or nudges the ball into a better position for the next stroke. He used his foot to improve his lie - hence, "foot wedge."
Needless to say, the "foot wedge" is an illegal club and its use is against the rules.
Examples:
Bob must have used his foot wedge to get out from behind that tree.
