1. a person or animal that refuses to proceed or comply; one who balks
Usage: also spelled 'balker'
2. in billiards or snooker, a player who plays from the baulk line
Usage: chiefly British; specialized sports term

Examples

• The horse proved to be a stubborn baulker, refusing to jump the fence.
• He was known as a baulker when it came to making difficult decisions.
• The mule was a notorious baulker on the mountain trail.
• In snooker, a skilled baulker can control the game from the opening shot.
• She earned a reputation as a baulker of authority throughout her career.