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If it exists, it's probably in Japan.
Truman: Raw horseflesh Ice cream?
Yu Min: No Way!!! That can't be real.
Truman: Rule 38.
Yu Min: Topo!
by Elite CAT September 18, 2008
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Rule 38 is a prison offence in which someone is masturbating in public.
He got locked up because he kept doing a rule 38 in front of the female prison guard.
by Cereal KiIIer June 20, 2010
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Analogous to Rules 34 through 37, Rule 38 states that if something exists, there is a plushie of it, or there will exist a plushie of it. This is not a constant, but an inevitability; i.e. not all things have plushies, but come the end of time, they will.
"Half-Life 2: Episode Two had those really scary Hunter enemies; now they have them as plushies."
"Christ, Rule 38."
"WTF is rule 38?"
"It's like all the other Rule 3x's, but about plushies."

by Flatterland August 21, 2008
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4
One of Gibbs's rules from NCIS: Your case, your lead.
Tony: Aren't you going to interview him?
Gibbs: This was a case you worked when I was retired. Rule 38 DiNozzo.
by vespasegway March 07, 2017
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