Green’s Dictionary of Slang

(US) Mexican, pertaining to Mexican culture.

1990		S. Morgan Homeboy 233: Kitty upended her purse [...] dumping out all its beaner play money.
1994		T. Willocks Green River Rising 71: Too much beaner jissom swillin’ round your guts.
2000		M. Manning Get Your Cock Out 56: Gerry [...] took a clumsy swing at the fresh faced teenager, missed by a yard and fell flat on his beaner arse.