Fright Night

The stooges are managers of "Chopper", a beefy boxer, and they bet their bank roll on his next fight. When a gangster tells them to have Chopper lose or they'll lose their lives, the boys decide to play along. They try to soften Chopper up by feeding him rich food and having him spend time with their friend Kitty. The fight gets canceled when Kitty dumps Chopper for his opponent and the two boxers engage in some pre-match fisticuffs that result in a broken hand for the opponent. The stooges thin (imdb)