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1 definition by r31vhead

 
1.
cat
In automotive terms, cat is short for Catalytic Converter - a device to break down the harmful emmisions released into the atmosphere by a car's engine.

Some people hollow out their cats(sometimes referred to as "gutting") or remove them altogether to improve performance, despite the fact that it is illegal in many (but not all) countries.
I gutted my cat yesterday.
My cat's got a rattle in it.
by r31vhead January 18, 2004
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