The phrase nip it in the bud means to stop something before it gets going. You’ve probably heard it used in this way: Nip that bad habit in the bud before it gets out of control!
What does this phrase actually mean? Nip means to remove by pinching, biting, or cutting with two meeting edges of anything; to clip. A bud is a newly formed leaf or flower that has not yet bloomed. To nip something in the bud means to pinch off a newly formed leaf or flower before it has a chance to grow.