I was reading a novel when I faced some metaphors, I tried to guess the meaning and here is the result:
1.I laughed my socks off=I Laughed out loud or I laughed a lot.
2.He was the apple of her eye=She loved him very much or She was very fond of him.
3-They had a skeleton in the cupboard=They had a secret that could ruin them.
4-We had a real pig of a day=We had a bad day.