Green’s Dictionary of Slang

1. (W.I.) a Jamaican.

1976		‘In The Melting Pot’ in P. Ashton et al. Our Lives (1982) 180: You know somet’ing, you are getting to talk like us J.A.’s.
2012		Jamaican Gleaner 14 May 🌐 So sad some JAs will quickly say a homie is not believable when they have been done wrong.

2. (US) a Japanese-American.

1998–2002

Clayvision 🌐 Signs that you are Japanese American [...] 52. When you visit other JAs, you give or receive a bag of fruits or vegetables.