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1 definition by mcdsworkerr

A mcmac is the sexual action of filling a womans vagina with big mac secret sauce then eating it out, therefore bypassing the unbearable fishy taste associated with a vagina.
We went to Mcdonalds and ordered 5 big macs, scraped off all the secret sauce and i mcmaced her all night
by mcdsworkerr November 15, 2010