Nobody keeps records of that sort of thing, but Shakespeare invented a lot of idioms.
Idioms are literary terms and tools. These idioms represent different things to different people and pictures will vary from person to person.
"An apple a day keeps the doctor away"
Some popular idioms from the 1950s include "the bee's knees" (something excellent), "cool as a cucumber" (calm and composed), and "living in the fast lane" (engaging in a risky or extravagant lifestyle).
A calm mellow cat. Since you posted in idioms, I assume you mean the slang to describe a person. It means someone is hip, with-it, etc. Mostly used in jazz type clubs.
An homonym for cooler is "cooler," which can refer to a device that keeps beverages cool or to a person who remains calm in difficult situations.
Progesterone
Each of those idioms is already a sentence.
It doesn't mean anything except the fact that they are speaking their language. All languages have slang and idioms. It means that they are using saying from their dialect.
Yes, It works on my son, and keeps him calm.
idioms that you can say
There is not a calm in a rock. Calm refers to an emotion a person feels. Calm is an adjective. A rock is considered an object and does not feel emotions.