The act of throwing yourself into a pool or some other body of water in a ridiculous and haphazard fashion. Generally the best gangles include flips, twists, flailing of the limbs, and/or strange body contortions. More often than not, the best gangles happen when you don't know what you're going to do before you do it
first man: "What was that? That dude just did something in when he jumped into the pool!"