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The raunchy smell caused by dirty male underwear which sticks to anything that the underwear comes in contact with such as body parts, clothing, furniture or carpeting. Originally, Rotwang was the name of a mad inventor in Fritz Lang's 1927 science fiction film "Metropolis". In German, "rotwang" translates to "rosy cheek", which relates to the ass rash which dirty underwear can produce.
"Oh man, Marshall's room has a bad case of rotwang!"

"Darin thinks nobody notices his rotwang."

"Like an idiot, I got rotwang all over my new jeans."
by bearcritter September 26, 2011
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