money-match
A one off match/set in any head to head fighting game, in which either or both players put forth a certain amount of money to be awarded in full to the winner.
After the tournament, I money-matched in the hotel room till I could pay it off.
money match
A match, such as of Super Smash Bros Brawl, where the loser must pay a predetermined amount to the winner
"Come on let's go, I'll play you in a money match"