Beater (noun)

1. A tool or device used for beating or stirring something.
2. A person or thing that beats or defeats someone or something.
3. An old or run-down car or other vehicle.

Origin:

From the verb "beat" which means to strike repeatedly.

Examples:

1. She used a beater to mix the eggs.
2. The underdog team was the beater of the tournament.
3. He drove his beater to work every day.
4. The beater was made of wood and was worn from years of use.
5. The beater was outmatched by the newer and more advanced fighters.