Joe Shmoe (also spelled Joe Schmoe and Joe Schmo) is one of the most commonly used fictional names in American English. It is used to identify the typical, everyday person who does not have any special status, frequently in contrast to some group. Adding a "Shm" to the beginning of a word is meant to diminish, negate, or dismiss an argument (for instance, "Rain, shmain, we've got a game to play"). This process was adapted in English from the use of the "schm" prefix in Yiddish to dismiss something; as in, "Fancy, schmancy."
While "schmo" ("schmoo," "schmoe") was thought by some linguists to be a clipping of Yiddish "schmuck",[1] an etymology supported by the Oxford English Dictionary,[2] that derivation is not universally accepted.[3]