Top Definition
1. A mentally deficient simpleton with rodent like attributes.

2. A person who has succumbed to substance abuse; characterized by one or more continuously growing teeth and/or whisker-like facial hair.
1. Quit sniveling you sleazy Rattardo!

2. I just saw that Rattardo gnawing on a crack pipe.
by Annamandabella November 13, 2011

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