This describes any physical layout or component that features a sharp, angular bend resembling the hind leg of a dog. Tradespeople use the term for offset bends in conduit, crooked access roads on a site, or misaligned structural joints. It usually implies an awkward deviation from a straight path that requires extra fittings or careful maneuvering to navigate.
Heard on the job
You'll need to pull that cable through the dog leg in the ceiling void, so use plenty of lube.
Insider tip
When bending conduit, a dog leg is usually a mistake where two bends are out of plane with each other, ruining the piece.