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A black squirrel. Generally larger than your average red squirrel. They look at you with their mean little beady eyes and laugh at your dogs as they tease them.

It's a dog's personal life goal to catch one of these mangly little beasts.
John: Was that a dog that just bounded across the street?
Petunia: No man, that was a gangster squirrel.
John: Way cool dude.

My dog was rolling around contentedly in some dead fish, when he spotted a gangster squirrel making it's way up a tree. He ran towards it, barking maliciously. The g-squirrel laughed and continued up.
by theotherwhitemeat August 04, 2009
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