1. Someone from Canada with a Chinese background. Most of the times engages in acts which make the Chiui seem like a loser. Always, deep down inside, Chiuis are beautiful people. Sometimes they are beautiful on the outside, as well.
2. The nickname for Picachu.
3. The name for any diverse sexual act which cannot be defined as anything else.
Look at that loser. What a Chiui!
Q: So what did you do to her?
A: I think I'd call that a Chiui