Not mess around Definition 1 of 3Pro Tip 1/3Urgency Express urgency or importance without delay, especially in professional scenarios. We can't mess around, the project deadline is tomorrow. Pro Tip 2/3Work Context Often used at work to encourage fast and serious action. The boss told us not to mess around and finish the report today. Pro Tip 3/3Directive Tone Can sound commanding when used by someone in authority. The coach said not to mess around and focus on the game.