Im going to chay all over your hair and it will take weeks to get all my chay out
Can also be used as a greeting or in a demeaning or sarcastic context, usually to describe a try-hard.
Man, I can't believe the air I got off that jump! That was pretty chay!
Aw, chay! Long time no see! What are you doin' all the way out Yarrabah way?
Ignore him, he thinks he's such a chay cunt.