1.A person of cowardly actions and deed. Usually lazy and unwilling to take action.
1.Hah, Those europeans can be so cowardly sometimes, bunch of Milk-drinkers.
2. Heh, Those hippies are nothing but a whole bunch of cockholstering, bootlicking Milk-drinkers.
A weak or spineless person. The implication is that milk is a drink for children, whereas real men drink booze. Popularized by the Bethesda game Skyrim.
You really think you're a match for me, milk-drinker?