Definitions by YungSebs

Rosetta Stoned 

The state of being so high that you begin speaking another language.

Friend 1: Yo, did you know that Marcel speaks Mandarin?
Friend 2: Yeah, but he only knows it when he's high as a kite, man. He was straight up Rosetta stoned last night.

Rosetta Stoned by YungSebs June 2, 2016