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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."
rotwang by bearcritter September 26, 2011
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rotary, rotor, rotar, rota, rotang 

Any Wankel rotary-powered mazda in Aus or New Zealand (or other car retrofitted with rotary engine) R100, RX-2/3/4/5/7/8. The greatest form of transport ever. Rotang is NZ term.
"Wanna catch up? Buy a rotary!"
"Dat rota iz full sick Habibs!"
Type of affiliation with legendary Mazda rotory sport cars.
Mad Mike Whidett is the ruler of the Rotang Gang since he has dedicated his life to keeping the rotory alive and winning!
rotang by SSgtDrift December 5, 2020
A right wing nut!I know ,the nut part is redundant!
A ratwanger had a good idea once,but it died of loneliness!
ratwanger by urlnts March 28, 2010
An extremely derogatory term used to describe someone who is unpleasant, cruel, or unliked.
After Jenny uninvited me to her party, I told all of her friends she was a rotangu.
rotangu by gmasterfreakydude December 22, 2008
A short stubby dick. They are usually smaller than an inch and are smaller than a Hamsterwang.
Ratwang - Oh my god! Its not even an inch!
Ratwang by IdidSurgeryOnAGrape November 23, 2018