1707, spelling variant of mamma. Meaning "sexually attractive woman" is attested by 1925 in African-American vernacular. Mamasan "woman in a position of authority," especially "woman in charge of a geisha-house" is by 1949, with Japanese san, an honorific title. Mama mia! as an exclamation of surprise, etc. is by 1848, from Italian, literally "mother mine!"
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