The pronunciation of how an oriental person, be it japanese or chinese or korean, would say "you're so stupid". This line was made famous by Weird Al Yankovic's under-appreciated movie UHF (well, back in its day it was under-appreciated) by that martial arts teacher named Kuni.
"Nothiiiing!! Absolutely nothiiiing! STOOPIIIID!! YOOO SOOO STOOPIIIID!!!"
-Kuni bashing the chick who chose to take the box in Wheel of Fish, UHF