Eat Your Hat
You lost a bet, and now you have to eat your hat like it's the most painful thing you've ever done. It's like losing your favorite toy and your last dollar.
"Eat your hat, you loser!", after losing a bet to his best friend.
"Eat your hat, you dumbass!", after betting he'd win the race and he didn't.
"Eat your hat, you piece of trash!", after losing a bet to his brother.