jit

A young person — a kid, a teen, sometimes a younger sibling. Affectionate or dismissive depending on tone.

A rookie or inexperienced person. Used to call someone out for being naive even if they're a grown adult.

A young person, usually a teenager or younger. Affectionate from an older head, dismissive when used about someone trying to act grown. Detroit and the South (Florida especially) both claim it; the South amplified it through hip-hop, Detroit kept using it the whole time.

Originally a Florida prison term — short for 'juvenile in training' — for a young, foolhardy lad who didn't know what he was doing yet. Bled out of the prison system into Florida African American English and then into the wider US through rap (YNW Melly, Kodak Black, Smokepurpp). Today it just means kid, often with a slight edge: young, green, acting up.