Hair grease - A stupid way to say 'bye' or 'see you later,' like a kid who

A stupid way to say 'bye' or 'see you later,' like a kid who thinks he’s cool.

My brother said, 'Bye, hair grease,' and I was like, 'You’re gonna say that every time?'

At the bus stop, I said, 'Cyalater, hair grease,' and the bus driver laughed at me.

I waved and said, 'Bye, hair grease,' and my friend called me a loser.