Green’s Dictionary of Slang

1. to dislike intensely.

1978		W.D. Myers It Ain’t All for Nothin 65: One [thiing] was hating on Lonnie and the other was not hating on him.
2012		G. Flynn Gone Girl 266: ‘Oh, shit, here it goes,’ Greta says. ‘People are hatin’ on this guy’.

2. to do something bad to somebody else.

1997–2001

Online Sl. Dict. 🌐 hate on v 1. to be jealous of something or someone. (‘She wanted the guy for herself, so she hated on me and told him I was already taken.’).

see under gut n.

(US campus) a sarcastic expression of pleasure.

1988		Eble Campus Sl. Mar.
1990		Eble Campus Sl. Apr.