• large marsupial mammal with a long tail and powerful hind legs for jumping (native to australia and neighboring islands)
• a kangaroo is a large australian animal which moves by jumping on its back legs. female kangaroos carry their babies in a pouch on their stomachs.
• unauthorized court, court that is not certified
• a kangaroo court is an unofficial trial of a member of an organization who is accused of having seriously broken the rules of that organization.