D defs.my
Entry 1 sense Webster, 1913

Curtail dog

/(dŏg`; 115)/ · Cur·tail dog · IPA
01 A dog with a docked tail; formerly, the dog of a person not qualified to course, which, by the forest laws, must have its tail cut short, p…
  1. 1.
    A dog with a docked tail; formerly, the dog of a person not qualified to course, which, by the forest laws, must have its tail cut short, partly as a mark, and partly from a notion that the tail is necessary to a dog in running; hence, a dog not fit for sporting.
    “Hope is a curtail dog in some affairs.” Shak.