casual, generic term of address for a man, 1928, from Irish and Gaelic mac, a common element in Scottish and Irish names (literally "son of;" see Mac-); hence used generally from 1650s for "a Celtic Irishman."
M.P.
ma
ma'am
Maat
Mabel
Mac
Mac-
macabre
Macaca
macadam
macadamia
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