1. a person who steals cattle or horses
Usage: historical; Western U.S.
2. a person who is very energetic and works quickly
Usage: informal

Examples

• The sheriff tracked down the cattle rustler across three counties.
• Horse rustlers were a serious threat to ranchers in the Old West.
• The rustler was caught red-handed with stolen livestock.
• She’s a real rustler who gets things done quickly.
• As a rustler in the business world, he closed deals faster than anyone.
• The young rustler impressed everyone with her work ethic.