When something is tustled and dirty as a rat. When coocaburrows live in/or on it.
Look at her old rat nasty wig. It looks like she found that in the road.
by Lollypoodle June 17, 2011
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Aka, the person who messes up your stuff and/or rolls clay to you. A common name for a Nasty Rat is Avery and Carson.
The Nasty Rat annoyed me so I stabbed them.
by Miss Ma'am Sir February 10, 2020
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