D'mah - A word that means 'dumbass' but is way less cool. People use

A word that means 'dumbass' but is way less cool. People use it when they’re too scared to be called out for being smart.

She said, 'D'mah, he just tried to explain why the ocean is blue with a crayon.'

He whispered, 'D'mah, he tried to eat the math test.'

She mouthed, 'D'mah, he asked if clouds were a new type of sandwich.'