Any woman who refuses to have sex for (apparently) no good reason. References the stereotype of Jews as stingy, hoarding and ungenerous...combined with the slang meaning of "ass" (pussy, vagina, stank, cunt, puddin, poontang, et al) the indication is of one stingy with "ass".
She won't give it up - she's an assjew...
by Lord Heavyhandz - nEvErMiNdThEbOllOx March 15, 2005