Insane Laughing Disorder.
When one starts laughing and cannot stop.
Person 1: A lady had 3 daughters. The first daughter asks her mother why she was called Rose. The mother says "Why, darling, when you were born, a rose fell on your head. The second daughter asks why she is called Daisy. The mother replies "Because a daisy fell on your head when you were born". The third daughter approaches the mother and says "UUHHHHHHHH!!", the mother replies "Oh shut up Fridge!"
Person 2: LOLOLOLOL LMFAO ROFL AHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA etc
Person 1: Dude, what is up with you? You have ILD.