A bunt and a slap are 2 completely different things. Slapping the ball uses a swinging motion of the bat, a bunt, including a drag bunt do not.
ASA definition of a bunt: A pitched ball that is intentionally tapped with the bat, slowly, within the infield.
NCAA & FED definition of a bunt: A bunt is a legally batted ball not swung at but intentionally tapped with the bat.