Dingus

A dingus is a person who frequently says or does something stupid or dumb. Keep in mind a dingus isn't a stupid person, in fact they may be a very intelligent individual. Being a dingus doesn't mean you aren't good at reading or geometry, it just means you don't always make the best decisions. They never fail to make you laugh though and they are usually your best friend.

Autumn: Hey Bella, did you hear Rya sprained her ankle at the trampoline park?
Bella: Wow, what a dingus. I mean, is she okay?