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Involuntary semi, caused by an unknown mix of vehicle vibration, women and the inevitable smell of diesel fumes leaking in through the back seats on a crappy public transport. Usually happens in a morning on the way to work.
8:30 AM - the bus is packed. It smells of diesel fumes as you sit on the back seat. The bus is old and vibrates like mental. A hot woman gets on the bus and you're suddenly aware of a semi, but you don't know what's caused it. 'Diesel Nob'
by roocifer July 15, 2010
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Jul 7 Word of the Day
When you're being horny (especially around friends) and as a result shame ensues.
Friend 1: "Aw man, I could totally fuck a catgirl right now.."

Friend 2: "That's it, you're going to horny jail."
via giphy
by Blysterz October 19, 2020
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