Forget it Definition 1 of 3Pro Tip 1/3Finality The phrase implies a decision or situation is unchangeable and final. The event was cancelled? Forget it, no point arguing. Pro Tip 2/3Dismissive Tone It can express impatience or dismissal, suggesting something isn't worth considering. Repair that old car? Forget it, just buy a new one. Pro Tip 3/3Hopelessness Indicates there's no hope or chance for something to happen or change. Win the lottery to solve your problems? Forget it.