Acronym for Johnny Just Come: Nigerian slang used to reference someone who is naive or new to a situation/place.

A cultural and aesthetic mind-state that prioritizes making money, even as an “underground” or “radical” creator. The work isn’t made for money, but it’s the money that matters the most.

from a livestream in september 2019 from cowchop meaning

Nigerian slang used to describe a foreigner - usually a Westerner - recently arrived in country and who is often unfamiliar with local customs and therefore a target for 419 or scammers