Yax

An absolute troglodyte.

You’ve been acting a lot like a Yax lately… is everything okay?

Yax

(Noun/Verb) When a product or service is unreasonably expensive; A play on the word 'tax' used loosely in casual conversation.

"Those guys charge too much, the material is yaxxed."
"Plug said the 8th is $50, dude is yaxxing."