spilt milk

cry over spilt milk

To worry about unfortunate events which have already happened and which cannot be changed.

dick milk

Semen.

milk drinker

Someone who lacks experience or courage.

milk of human kindness

Compassion shown to other people.

milk the clock

To use as much time as one can in order to gain a benefit.

Satin and silk

[Cockney slang]milk

Suggestive of its smoothness.