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Pervert. Someone who enjoys touching small children inappropriately. A code word two friends use to talk about pedophiles and disgusting child touchers when they are in public as to be conspicuous.
"Ewww... see that old guy holding that little girl--- He is totally an Uncle Neddy!"

"Don't let him near your child! I hear he is an Uncle Neddy!"
by JazzyPants February 22, 2012