Mongrel
WordNet
noun
(1) An inferior dog or one of mixed breed
(2) Derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin
"The architecture was a kind of bastard suggesting Gothic but not true Gothic"
WiktionaryText
Noun
- Someone of mixed kind or uncertain origin, especially a dog.
- That dog is a mongrel, who knows what breed it could be!