The name for a "Jewish Mexican", Jewish as in the terminology when one "Acts like a Jew", a.k.a., a total and complete Douchebag. Of course, they need to be a beaner as well, hence the "Mex", but that's secondary, which is why it's second in chronological order.
"That god damned beaner just hopped over my fence. Fucking Jumex."
by DocsManCave June 19, 2009