Alastor
Pretty sure milk is actually bad for you...
January 17, 2014
Theodorus
Ragnar got it right. Milk is what babies "eat" to help them develop. Adults generally do not need milk. So the insult is that you are not fully developed. You are a baby.
January 17, 2014
Okan-Zeeus
You know what I've always wanted to do? Walk away and drink a jug of milk after someone calls me this in the game. Preferably after I've horrifically disemboweled and/or beat the crap out of them at some point in between...