Longtail \Long"tail`\, n. An animal, particularly a log, having an uncut tail. Cf. Curtail. Dog.

Note: A longtail was a gentleman's dog, or the dog of one qualified to bunt, other dogs being required to have their tails cut.

Cut and longtail, all, gentlefolks and others, as they might come. --Shak.

Source: Webster's Revised Unabridged Dictionary (1913)