olive branch
An overture; a symbol of peace.
Tired of the constant fighting, the majority government extended an olive branch to the militant minority.
people who live in glass houses should not throw stones
Do not complain about other people if you are as bad as they are. A proverb.
Mary says that Betty is jealous, but Mary is more jealous herself. People who live in glass houses should not throw stones.
signed, sealed, and delivered
Finished; completed; in a state of completion.
"How is the campus renovation plan for the governor's office coming along?" the dean of the college asked. "Signed, sealed, and delivered," his assistant answered.
skin alive
To scold angrily.
Mother will skin you alive when she sees your torn pants.
To spank or beat.
Dad was ready to skin us alive when he found we had ruined his saw.
To defeat.
We all did our best, but the visiting gymnastic team skinned us alive.
yellow-livered
Cowardly.
The young boy greatly resented being called yellow-livered and started to fight right away.