He was filled with 'the milk of human kindness'. [=he was filled with kindness; he was very kind]
They 'milked' [='exploited'] their advantage for all it was worth.
greedy landlords 'milking' their tenants of all their money
(..) Is life always this hard, or is it just when you're a kid? Always like this. Keep it. I'm going grocery shopping. You want some milk? One quart or two? It's two, right? I like these calm little moments before the storm. It reminds me of Beethoven. (..)1994 Léon: The Professional
(..) Do you understand? - So say it. - I understand. Good. Jesus. Hola! Qu' tal amigo? Two milk as usual, eh? Why did you hide the cigarette? This building's full of rats. I didn't want my old man to find out. Got enough problems. What happened? (..)1994 Léon: The Professional