Get going! or Let's get going! means "Let's hurry up and let's go", " C'mon, let's shake a leg", "Let's get this show on the road!", "Time's a wasting!", "Let's get a move on!", "Let's get moving here!", "Let's get cracking!", etc.Originally Posted by ssendur
It's an informal way of saying "Let's hurry". I can't think of any other examples right now.