Shm-reduplication
Shm-reduplication or schm-reduplication is a form of reduplication originating in Yiddish in which the original word or its first syllable (the base) is repeated with the copy (the reduplicant) beginning with the duplifix shm- (sometimes schm-), pronounced . The construction is generally used to indicate irony, sarcasm, derision, skepticism, or lack of interest with respect to comments about the discussed object.