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Rusty Buffalo 

A person so consistantly angry, cantakerous, grumpy or mean that they can only be likened to an American Bison getting it's taint scrubbed with a wire brush.
God, your dad is a jackass.

Yeah, he is a regular rusty buffalo...
Rusty Buffalo by SlamHog November 15, 2009

Rusty Buffalo 

Donut Operator thinks it is a thing and he was right.
"the ol rusty buffalo, sounds like something on the urban dictionary"
Rusty Buffalo by jaquavywavy August 13, 2022