Asdan is a popular term used by school students that are mostly from East London wich is used to describe someone who has done or said something idiotic
did you see him fall he's such an asdan

larry is such an asdan he is failing all of his classes
by missan November 30, 2017
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what northerners say to southerners in England to call them a complete retard and make them feel left out.
Tom: Dude, I put ketchup on my cornflakes.
Gus: Your an asdan.
by yourtypicalwhiteguy October 6, 2010
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