A knuckleballer is a unique type of pitcher in baseball, known for their difficult-to-predict pitches due to the unpredictable movement of the ball. However, there are several synonym terms used to describe knuckleballers. Some terms commonly used include flutterballer, dancing ball pitcher, floating fastballer, and knuckler. Additionally, some people refer to knuckleball pitchers as slowballers due to their relatively low pitch speeds compared to other pitchers. Regardless of the name, knuckleballers are recognized for their ability to confound batters and create unexpected outcomes on the field.