whipper

/ˈwɪpər/
noun
  1. A person who whips something or someone, especially as a punishment or in a sport.
    • The jockey is a skilled whipper, using the whip to urge the horse forward.
    • In the old days, a whipper would punish criminals in public.
    • The dog trainer was known as a gentle whipper, never causing harm.
Synonyms