It can be used as a replacement for a person, place, thing, or idea
George: Pass me the junt.
Willow: What? What do you want?
George: The TV remote, dummy.
Willow: Well, if you spoke properly I’d know what you wanted, asshole.
or
Stacey: Are you and Brian going steady now?
Sue: Nope, he’s just my junt.
It can also be used to describe casual dating before people officially decide to become boyfriend and girlfriend.
This song is called 'Pass That Junt', where junt refers to marijuana. The lyrics include:“Pass that junt, pass that junt nigga/14 years old smokin’ da finest green/wanna run up on me? You can find me in Memphis Tennessee”