11. Let Your Hair Down
Meaning: To relax and behave in a free manner
Origin: In the 17th century, Parisian nobles must appear in public with elaborate and intricate hairstyles, which required hours of work that it becomes relaxing when they come home at the end of the day and let their hair down.
12. Kick the Bucket
Meaning: To die
Origin: In the old days, when animals are killed at a slaughterhouse, a bucket was placed under it while it was positioned on a pulley. When the ropes are adjusted, the animals would literally kick the bucket before being slaughtered.