Derived from the Spanish term "no mames" translated to mean "don't suck"; "don't be a retard".
A term used to describe a clueless male; a big baby huey; person who is fond of cheeseball things; male who thinks exploitation of women is cute and is compelled to call out every hot chick in sight (example: "Dude, look at that chick over there, she's the bizness!"); Mamill dudes are usually found trying to get into trendiest spot of the moment or at the gym! Doy.
"Check out that Mamill that just walked in with all the tattoos and the incredibly tight t-shirt, he keeps looking at himself in the mirror."