Top Definition
this word can be used in many ways and is quite diverse, but is commonly an insult.
1. someone who is grimey. maybe they haven't showered. or they are a slob.
2. a person who is schemey or annoying
3. typically a friend that pisses you off in some way
"damn mongrel rat"
by Petrarca July 01, 2009
8 Words related to mongrel rat

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