General
bobtail
What does bobtail mean?
A tractor unit rolling without a trailer hooked up. Looks stubby and weird without the box behind it, hence the name — like a dog with a docked tail. Can be a noun (the truck itself) or a verb (the act of driving one that way). Bobtailing is sketchy in the wet: no trailer weight on the drives means the back end wants to swing out under braking.
"I dropped the load in Memphis and bobtailed back to the yard."
Origin
From the 19th-century term for a horse with a docked (bobbed) tail, later applied to any short, stubby vehicle. CB radio culture cemented it for tractors running solo.
Frequently asked questions
What does bobtail mean in trucking?
Bobtail refers to a semi-truck driving with no trailer attached — just the tractor unit on its own. It's also used as a verb for driving that way.
How do you use bobtail in a sentence?
"I dropped the load at the yard and bobtailed home for the night."
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