Mongrel
Australian SlangDefinition
An insult for a contemptible person; also denotes gritty toughness or aggressive spirit, and by extension a dirty or unfair act.
Examples
"That bloke’s a mongrel for pinching my wallet on the train."
"The footy side showed real mongrel in the last quarter, scrapping for every ball."
"Taking him out off the ball was a mongrel act, pure and simple."