Top Definition
A creepy guy who probably harmless, but scares schoolgirls by leering at them.
Hey Ma, when I was going to school today, there was a dirty norman at the bus stop.
by Boc2 November 09, 2007
A middle aged man with a large belly and a small shirt. Where the mans belly hangs out of his undersized shirt.
"Hey man looks like your getting a dirty norman, maybe its time to hit the gym or buy XL shirts."
by SirMike June 17, 2008
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