A hero with a zero
A hero with a zero is a guy who saves the world but still can't pay his rent
"I saved the universe, but I still got evicted. I'm a hero with a zero.", @SpaceDude2000
"He fought off aliens, but he still got a ticket for parking in front of a fire hydrant. Zero.", @AlienSlayer
"He's a hero with a zero. He saved the day but still can't afford a decent pizza.", @PizzaLover99
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