southpaw

noun3

1. •
   (informal) One who is left-handed, especially in sports.
2. •
   (informal) 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.
3. •
   (informal) A boxer who leads with the right hand and guards with the left.