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*
by lil biden May 2, 2022
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Getting wrapped up in the moment and having sex in the car park because why the hell not.
by Btecsamanthajones August 19, 2021
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This word isn’t funny, therefore it is undeserving of a funny definition.
Guy: Did you hear about the guy next door?
Guy 2: No! What happened?
Guy: His car spontaneously combusted! Haha!
Guy 2: That’s not funny Harold.
by Marco_Swirly November 17, 2020
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that girl just sent me the most spontaneous image ever. never knew an ass could look so good!
by idfkwhattodaypuzzy May 17, 2021
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The process by which an ofspring from a nice family becomes a jerk.
Joel's mom is so nice, but he's such a bigot. Must be a case of spontaneous neanderthalism.
by JavaJaneOhio August 12, 2010
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