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1.
A surname given to the most attractive species of male. These males are usually super smart, extremely funny and good at sports and other activities.
Girl 1. Look at that guy on the football field with the huge muscles and great general athleticism.

Girl 2. Yeah. He must be a Minto
by Nyrab Otnim February 16, 2008
 
2.
Usually used after the word willy to form the phrase 'willy mintos'

An announcement of elation and/or disbelief.
I've won the lottery? Willy Mintos!
by Noodle November 28, 2003