spontaneous green day disorder

Spontaneous green day disorder (SGDD) is a very common disorder in which one will spontaneously start singing or humming a green day song. This condition can only be treated by converting the affected into a blink-182 or nirvana fan. This condition is found most commonly among people who grew up during the final years of the tv show "Seinfeld".

Person 1: "Do you have the time, to lis-"
Person 2: dude what r u doing?
Person 1: oh I was just diagnosed with SGDD, spontaneous green day disorder.
Person 2: I don't have time for this. *walks away*