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
to steal fuel off people
'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
to be a buffoon, failure to achieve a simple goal.
Wayne Rooney acted like a complete rossco.
by le guv April 06, 2011

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