A funny idiom.

Pass it on as a joke: joke: joke; Jokes. Spread around and become a message that makes people laugh and cry.

Generosity: refers to making people in the circle laugh. "Laugh and be generous".

Laugh: refers to making people in the circle laugh.

Rap: To talk nonsense or play jokes on people endlessly.

Make people laugh: make people laugh; Generosity: originally refers to people who know the avenue, and later refers to people who have knowledge or expertise. Make the insiders laugh.