BOBTAIL
bobtail, bobtailed
(adjective) having a short or shortened tail; “bobtail mare”
bobtail, bob, dock
(noun) a short or shortened tail of certain animals
Source: WordNet® 3.1
Etymology
Noun
bobtail (plural bobtails)
A short, or deliberately shortened tail.
An animal that has a bobtail, such as certain canines or nags.
(agriculture) A tractor which performs without its trailer.
A tractor-trailer that is relatively short in length.
Verb
bobtail (third-person singular simple present bobtails, present participle bobtailing, simple past and past participle bobtailed)
(agriculture) To drive a tractor without its trailer.
To drive a truck or other vehicle without its trailer.
Source: Wiktionary
Bob"tail`, n. Etym: [Bob + tail.]
Definition: An animal (as a horse or dog) with a short tail. Rag, tag, and
bobtail, the rabble.
Bob"tail`, a.
Definition: Bobtailed. "Bobtail cur." Marryat.
Source: Webster’s Unabridged Dictionary 1913 Edition