a clown
A clown is the worst kind of person, they’re dumb, they make dumb choices, and they’re the reason you’re still laughing at them.
My neighbor thinks he’s a clown because he wears a hat every day and talks to his dog.
My coworker called me a clown because I messed up a report and he laughed for five minutes.
My little brother thinks he’s a clown because he wears socks with sandals and talks to himself.