AllanMercedes is a very good looking, tall, cocky, charming and confusing male. stay away from allans! as future told me.. THEY belong to the streets!!! only good allans are the ones with e's. i warned you!
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.