schm-

prefix

1. (used to form jocular, usually derisive reduplications): our rich aunt in her fancy-schmancy clothes.

substituted for the initial sound of a word and reduplicated with it to convey derision (e.g. “Oedipus schmoedipus” in the punchline of the old joke about the Jewish mother and the psychiatrist), 1929, from the numerous Yiddish words that begin with this sound.