noun. The most Yiddish area of the brain, where bagels bloom and even the synapses kvetch.
Real citation: "All the ones with their brains inserted backwards …as God said: 'Cerebrum? Cerebellum? Schmerebellum? Which way does it go in?'"
(April 1999, Australian Skeptics, http://www.skeptics.com.au/quiz/1999/9904.htm)
Made-up citation: "Oooh, my schmerebellum hurts. Ouch vey!"