Regional pronunciation of the noun "man," often in the American South -- though it appears frequently in Chicago blues music, and particularly in the songs of Muddy Waters, where this pronunciation can be clearly heard.
I'm a mayne!
A full-grown mayne!
I'm a lovin' mayne!
-- Muddy Waters, "Mannish Boy"
#see man#boy#dude#and alternative spellings mane,#mayn.