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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