Jabalabadingdong
Jabalabadingdong is when someone acts like they're super smart but they're just being a total idiot.
My math teacher said 2 + 2 is 5. I told him he’s jabalabadingdong.
My cousin claims he invented pizza. He’s clearly jabalabadingdong.
My dog thinks he’s a philosopher. He’s just jabalabadingdong.