The art of having a wank whilst your partner is asleep next to you. The Rossco can be performed anywhere, usually silently.
"the missus fell asleep infornt of the telly again so I had a Rossco"
by Dan Shering March 12, 2008
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to be a buffoon, failure to achieve a simple goal.
Wayne Rooney acted like a complete rossco.
by le guv April 6, 2011
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'i came back to manchester terrace and some stain rosscoed all the fuel out of my motorbike i was very unimpressed'
by Enrique Sanchez June 24, 2007
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Judging a large group of people (especially racial minorities) due to a single experience with that type of person
Guy 1 - Brazil is just a fuckton of slums id prolly get shot son.
Guy 2 - Mate that's Rossco Energy
by GuyHorne May 30, 2019
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fingering your bird and making a big deal about licking your fingers infront of her. its best to make some good noises to make the experience so much better
i gave my bird a dirty rossco last nite !

sweet, what noises you make ?
by riverbelow November 23, 2006
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