Past tense of emcee; to have hosted or presided over an event as a master of ceremonies.
From emcee, which is a phonetic spelling of M.C. (master of ceremonies), a role that became common in entertainment in the early 20th century. The spelling reflects how people pronounced the letters aloud.
The word 'emcee' is literally how someone speaking English would pronounce 'M.C.' out loud, and Americans loved this so much they turned it into a real word, showing how slang and phonetic spelling can permanently enter the dictionary.
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