BDP - Brake Donkey Power. As opposed to BHP, Brake Horsepower. Unit of measure the power output of slow vehicles' engines at the crank (i.e. does not include loss in power through gearbox, sprockets etc en route to drive wheel(s)). Slang.
1. My Lada puts out 15 donkeys man, it's an animal!
2. Your Harley has brake donkey power, not horsepower!