definition of mongrel
mongrel. n. 1. (Breeds) a plant or animal, esp a dog, of mixed or unknown breeding; a crossbreed or hybrid. 2. (Peoples) a person of mixed race. 3. (General Sporting Terms) sport Austral and NZ toughness and physical aggression: a tall southpaw with plenty of mongrel.. 1. (Breeds) a plant or animal, esp a dog, of mixed or unknown breeding; a crossbreed or hybrid. 2. (Peoples) a person of mixed race. 3. (General Sporting Terms) sport Austral and NZ toughness and physical aggression: a tall southpaw with plenty of mongrel.