1. to live a charmed life – means to be very lucky in life. Example: Tom has lived a charmed life. Everything he does works out well.
  2. go around the bush – means that someone is not clear or honest on purpose. Example: Please stop beating around the bush and tell me the full story.
  3. lay a hand on someone – means to hurt someone or physically attack. Example: If you lay a hand on me, I’ll report you to the police.
  4. sit on your hands – means to do nothing about the problem you have. Example: They lost office largely because their traditional supporters sat on their hands and stayed at homes.

You can download a file with English Idioms here.