Give somebody five Definition 1 of 2Pro Tip 1/3Casual Greeting Used among friends or in casual settings to celebrate an accomplishment or say hello. We won the game — give me five! Pro Tip 2/3Symbol of Unity Implies partnership or shared success; it's often done by teammates or friends. We finished the project together, so give me five! Pro Tip 3/3Enthusiasm Booster An energetic way to show enthusiasm or approval towards someone's action or news. You passed your exam? That's awesome, give me five!