Jack Big Potato - Someone who thinks they're the best at everything, but they’

Someone who thinks they're the best at everything, but they’re just a sad potato who can’t even do basic math.

My brother is Jack Big Potato. He failed algebra but still thinks he’s a genius.

My mom called my dad Jack Big Potato because he tried to fix the TV and broke it.

My friend said his crush was Jack Big Potato. He didn’t even know what a crush was.