Hat quark on is a joke that came into existence because tom made a typo which autocorrect messed up more.
A "quark" hat. It is really made out of cork
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Origin[]
one Day tom and mason were chatting on steam, Mason then asked tom a questin but tom didn't notice. Then Mason told him to answer the question to which tom replied "what question?" However he misspelled and autocorrect made it even worse.