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A person (usually one holding leftist beliefs) who has read every single book, pamphlet and essay even remotely related to their ideology. A theorycel usually becomes insufferable due to their uncontrollable urge to use big esoteric words and definitions, while being unable to engage with anything possible in the real world. Your average theorycel can be found on tankie discords and twitter, peddling their specific form of socialism that will #definitelyworkthistime.
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