It's like a chao from the sonic adventure games, but instead of its blue onion shaped head its head is actually an onion.
These chao' smell very bad, just like an onion.
Used as an insult for smelly people, but primarily used for people who have bad breath.
Dude 1: "Every time you open your mouth it smells like 28 animals shit and died inside it. You've actually become a stink chao."
Dude 2: *Covers mouth* "Don't call me a stink chao, those aren't even real!"
by NoYouMan May 11, 2017
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