Really good joke or humour, especially in the sense of unintentional hilarity. Comedy gold is or is worthy to be a classic.
I heard something today that was comedy gold: "I had lunch with several international students here; one German, an American and two from Nepal, and they were so typical: The European guy talked about culture, the guys from Nepal talked about religion, and the American was eating".
When you are so funny by yourself that you laugh out loud without any participation by a partner.
Progresses from a small grin to a smile to a quiet giggle and then quickly reaches the climactic event of an audible belly laugh, or LOL. Following climax, tissue is often used to dry resulting wetness occuring in the ocular region.
My humor is not always understood by others and I frequently find myself involuntarily engaging in comedic masturbation.