Child predator, similar to Fliips and Edp445, also a female predator in specific cases.
Also can be used generally to describe 0 IQ Monkey retarded idiots.
Dude this dude was trying to hit on my little sister, he's a fucking Jonpatty!
Bruh that nigga actually is trying so hard to be a jonpatty rn, just get a girl who's legal!
Seriously?! A JONPATTY? HE WANTED WOMEN THAT BAD?! JEEZ