The late 1800s - it was short for the common friendly insult "muttonhead."
There is no specific definition for "grundgy mutt." It may be a made-up or slang term with no formal meaning.
Puppy, pooch, mutt.
"Mutt" is a term that is commonly used to refer to a mixed-breed dog, meaning a dog that does not belong to a specific breed. It is not a formal classification like purebred or hybrid, but rather a general term used to describe dogs of mixed ancestry.
A mutt
MUTT
Mutt the Mutt Trainer - 1919 was released on: USA: 6 April 1919
Mutt means dog, esp. a mongrel. But it can also mean a person regarded as stupid or incompetent. So you could say '' Look at that mutt'' or ''Hey mutt'' or ''You mutt''
The connotation of the word "mutt" is typically neutral to slightly negative, as it is slang for a mixed-breed dog. Some people may view the term as derogatory or inferior compared to purebred dogs.
a Mutt costs an average of $600
It usually refers to being dirty and smelly much like an old dog or Mutt. In other words, it's an insult.
The mutt jumped in the tub and was covered in bubbles.
Mihkel Mutt was born in 1953.