Italian slang for the Alpha male in the pack/herd/flock etc of any species (specifically canines and/or manatees)
As the manatees floundered around the ocean, marcantonio was warbling away and flipping it's elephant-esque appendages
by Richard Anthony November 23, 2007
An amazing person to be around. You definitely want a MarcAntonio by your side because he will always make you laugh. He is both intelligent and good looking. MarcAntonio attracts all the women and is a great person all around. He tends to be around large groups of people and enjoys to make others feel good.
by BicBoi- November 13, 2016