mongrel /ˈmʌŋ.ɡɹəl/noun 5adjective 1forms 1 noun5 •something that is a mix of different kinds, most often a dog whose ancestors are of different breeds •A dog with a lineage of two or more breeds.That dog is a mongrel; who knows what breed it could be! •(offensive) A person of mixed race. •(UK, slang) a person the speaker usually despises for being violent or nasty, but sometimes pitiesBut somebody's got to tell these mums and dads why their kids died, why this mongrel thinks he can wipe them out like a dirty rag. — 2019 •(Australia, slang) An erect penis; an erection. adjective1 •Of mixed breed, nature, or origin; of or like a mongrel.English spelling is often regarded as confusing and unpredictable due to the mongrel nature of that language. formsmongrels