Curveball
Part of speech: noun
Definition: A forespin pitch thrown by rotating the index and middle fingers down and resulting in motion down "curve" An unexpected turn of events initiated by an opponent or chance.
Slider
Part of speech: noun
Definition: Agent noun of slide; one who slides.A pitch thrown with added pressure by middle and ring fingers yielding a combination of backspin and sidespin, resulting in a motion to the left when thrown by a right handed pitcher.A similar delivery in which the wrist and ring finger work to impart backspin to the ball.A small greasy hamburger.A piece of teflon or similar material attached to a curling shoe that allows the player to slide along the ice.A widget allowing the user to select a value on a sliding scale.Any sliding component, such as the thumb of a scroll bar.