Jacapon
A Jacapon is someone who acts like they know everything, but they’re just full of hot air
"He called me a Jacapon because I said the sky was blue.", My friend’s TikTok
"She thinks she’s a genius. She’s a Jacapon.", Text from my teacher
"My brother called the mayor a Jacapon. He got a DM from the mayor.", My brother’s Twitter