Wiktionary
betail
vb. 1 (context transitive English) To furnish with a tail. 2 (context transitive jocular English) To take the tail off.
Usage examples of "betail".
Much as the sportsman loves the fox, it is a moment to him of keen enjoyment when he puts his heavy boot on the beast's body,--the expectant dogs standing round demanding their prey--and there both beheads and betails him.