"Yes, yes! that's all very well," said the king; " but I am afraid it's of very little use, my man." 1886, Peter Christen Asbjørnsen, translated by H.L. Brækstad, Folk and Fairy Tales, page 270:
Near-synonyms: man, bro
This round's on me, my man!
My man thought it was a good idea.
(informal) A casual, complimentary term for a man.