A lunge is a sudden forward movement or a lurch, often performed by an animal or a person, where they extend one leg or arm forcefully. Full definition
A bad - tempered affair which saw Patrick Vieira sent off for lunging at Ruud van Nistelrooy ended in more controversy, with the striker missing an injury - time penalty. (standard.co.uk)
One of my favorite Steel Club exercises that demonstrates this are alternating forward lunges with forward Steel Club presses. (onnit.com)
Explode up off the ground, switching the position of your feet in midair then landing back in lunge position with your right foot forward. (health.com)