Definition of "treyf" [treyf]

• Not kosher. (adjective)

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• "Jews began dubbing this sort of dish "safe treyf" - treyf being the Yiddish word for "unclean.""
• "Woody Allen called treyf (unkosher) on American Apparel for appropriating his image in an ad."
• "However of his twin sons Gordon the narrator and Bernard, only the later inherits his father's abilities just to refuse to use them because they are "treyf", unclean."