What is "has had it"

Usage examples of "has had it".

I suppose mother has had it all my life, and I never saw it before.

Calandrino here was the night before last robbed of a fine pig, and cannot discover who has had it.

But what's really disturbing to me about it, aside from the fact that letting the other side pick its own time and place to hit us is the strategy of weakness, is that I feel quite sure the Opposition has had it explained to them in confidential briefings.