from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To furnish with a tail.
- v. To take the tail off.
from The Century Dictionary and Cyclopedia
- To furnish with a tail: as, “betailed and bepowdered,”
- To take the tail off: a word jocularly formed on the analogy of behead.
From be- + tail. (Wiktionary)