Obvvz!
A loud yell that means you're so dumb you think the Earth is flat and your brain is made of jelly.
Obvvz! You're wearing your pajamas to school. Are you trying to look like a sleepy donut?
Obvvz! You said you'd stop talking in class. Now you're talking louder than the teacher. You're like a loudspeaker with a mouth.
Obvvz! You said you'd remember your password. Now you're asking your goldfish.