The word has a couple of meanings depending on the context in which it is used:

1. It is used to refer to a marijuana cigarette.

I only smoke one joint per day. pic.twitter.com/BwhVWSi382

— Stoner Barbie (@stonersvilla) November 11, 2024

2. It is a word used to say home.

“I need to pass by ko jointe to pick up a couple of things before we go”