J-bar
n.— «Install a mechanical device that locks to the steering wheel, column, or brake to prevent the wheel from being turned more than a few degrees. Commonly called clubs, collars or J-bars, these devices can act as a deterrent if installed properly.» —“Deter vehicle theft” by Dan Harvey InsideBayArea.com (Oakland, California) Aug. 2, 2006. (source: Double-Tongued Dictionary)
Further reading
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When she was a child, Chris from Santa Rosa, California, misunderstood the definition of the word vehicle—with amusing results. This is part of a complete episode. Transcript of “Wearing a Train, at That Age?” We often talk on the show about...