Top Definition
A rather large obnoxious Male. A play On words of Ellen Degenerous.
You drop your pie on the floor and a large male with glasses obnoxiously says you dumbass, and then proceds to eat the dropped pie. You say your such an Allan Degnerous.
You could describe Cartman from South Park as An Allan Degenerous.
by Richie Webber November 06, 2007

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