An infectious disease which causes the victim to frequently act in an extremely retarded manner, may it be in the form of making whale noises while clapping their hands like a seal, or staring at the ceiling while drooling helplessly and laughing as if possessed.

Symptoms include, but are not limited to:
* Wailing making whale noises
* Suddenly yelling 'Iowa' in an extremely retarded manner
* Laughing helplessly after making a bad joke or thinking about something remotely dark
* Acting autistic in public
* Making weird noises which include, but are not limited to, 'IOWAAAA', 'HUEEEEE', 'KEKKEKKEK' etc.

Person 1: "Hey, did you hear about John?"
Person 2: "Yeah, he was fine at the party until he had a Sudden Onset of Hyper Retardism... poor fellow lost it then and there and passed away making whale noises."

Person 1: "I couldn't stop laughing after reading the word 'special assembly' and imagining a bunch of students standing in lines, staring at the sky with their heads crooked, drooling from their mouths and endlessly laughing."
Person 2: "Yeah, well, you had a Sudden Onset of Hyper Retardism. Relatable."

Sudden Onset of Hyper Retardism by specialneedsbear June 8, 2018

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Retardidism

1. The act of being retarded through bacterial infection

10/10 kids suffer from retardidism.

Retardidism by HiHowAreYa@hi.com April 19, 2018

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Retarderism

a bitch who sits in the corner waiting for a fag to come

why are you sitting in the corner, that is unnecessary retarderism

Retarderism by pubichaironachair June 2, 2021