Southpaw

Noun

 * 1)  One who is left-handed, especially in sports.
 * 2)  A left-handed pitcher.
 * Since home plate is generally in the southwest corner to avoid glare in the batter's eyes, a southpaw's pitching hand is to the south.
 * 1) A left-handed writer who, instead of mirroring right-handed writers, turn his or her hand upsidedown in order to put the writing implement in the same position as right-handed writers.