The act of pressing the jump button and letting go before the character leaves the ground. This will result in a jump that is lower than a normal jump.
Mario is one of the most basic characters in the game. His strengths are similar to Dr. Mario's in that he has a powerful ground game and is able to set up for edge-guard situations with most of his attacks. Mario's recovery and range are also weak, but he makes up for it with his powerful ground game.