whipper-in

[hwip-er-in, wip-] /ˈʰwɪp ərˈɪn, ˈwɪp-/
noun, plural whippers-in.
1.
Fox Hunting. a professional or honorary member of a hunt staff who assists the huntsman with the hounds.
2.
British, whip (def 28).
Origin
1730-40
British Dictionary definitions for whipper-in

whipper-in

noun (pl) whippers-in
1.
a person employed to assist the huntsman managing the hounds in a hunt