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A stan is a supporter/booster of whatever. I do not remember the origin.

Pol here is abbreviated politician.

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Comes from the Eminem song Stan, about an obsessed fan named Stan.
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from the eminem song stan (also possibly from super-fan)
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Where's the "T" come from?
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It's a reference to the name Stanley, 'stan' is the signature at the end of letters being read in the song
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I had heard the folk etymology "stalker fan"
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