a milk boy is soft and has a milky complexion. It is ultimately a vibe. Everyone's first crush was probably a milk boy. Milk boys don't have much of a personality. There is nothing inside milk boy.
Having the mentality of a child still breastfeeding; Stubborn, egocentric and very naive.
Sometimes used in gaming.
Dave: Man I just got blasted, you should have backed me up.
Ethan: I wasn't in the right place and time.
Dave: Who cares? Now I'm dead and it's your fault.
Ethan: Dude, you're such a Milk Boy.