Step 1 : Introduction to the question "7. Male kangaroos are called boomers, jacks or old men - and what other name which is a common currency term?"
...1. Shillings 2. Pennies 3. Bucks 4. Pounds And the female of the species are either called does, flyers or jills. Baby kangaroos are called joeys. A group of kangaroos is referred to as a mob, troop or court.