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A phrase/meme which is common on, or originated from, 4chan.
Common examples of 4chanisms are: O RLY?, harbl, shoop da woop and rule 34
by Korgmeister December 29, 2006
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The belief of being better than everyone and hating everything but memes.
He's such a 4chanist, it's not even funny

He thinks he's better than everyone else. He must believe in 4chanism
by BrosifJoseph March 13, 2017
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The vengeful act of crapping on a lover's chest while they sleep.

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