A Mullens wager
A bet that's so pointless it's like throwing your money out of a window and hoping it comes back. You lose, you bet again, and you're just a sad, sweaty loser.
I bet $5 on a horse and lost. Now I'm betting $10 on the same horse. That's just ridiculous.
He bet his week’s allowance on a dice roll and lost. Now he's betting his week’s allowance on the same dice roll again. That’s just idiotic.
She bet her snacks on a coin flip and lost. Now she's betting her lunch on the same coin flip. That’s just absurd.