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Noun. A widely used term for behavior that redefines thunder-cuntery, specifically in the steampunk genre. Rumbletaint is literally an infectious disease, a horrible VD, a composite of the Clap, Crabs and Lead-Based-Paint-Poisoning from polishing the undersides of poseurs' zeppelins … with your mouth.
Oh dear Christ! I hung out with some uptight steampunks and caught me the rumble-taint! My junk is colors I don't have words for!!!!

That she-bitch gives me the shivers, I smell a bad case of the rumble-taint!
by A Count Named Slick-Brass November 25, 2010
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