whipper in
/ˈwɪpər ɪn/
noun
- A person who assists the huntsman in a fox hunt by keeping the hounds together and driving them forward.
- The experienced whipper-in knew exactly how to control the excited dogs.
- During the hunt, the whipper-in's job was to round up any hounds that lagged behind.
- The whipper-in rode alongside the pack, whistling to keep the hounds from straying.