crouch rocket
n.— «Dozens of drivers in Newport News found themselves stunned Saturday afternoon as a motorcycle raced toward them at a a high rate of speed. Al Winall was one of those drivers. “All of a sudden I looked up and one of what I call crouch rockets coming up the wrong side of Jefferson Avenue,” he said.» —“Biker Goes Wrong Way Through Traffic To Flee Police” by Lisa Godley WTKR-TV (Hampton Roads, Virginia) May 28, 2006. (source: Double-Tongued Dictionary)
Further reading
Eric from Harrisonburg, Virginia, wants to know: What’s the origin of footloose and fancy-free, which describes someone unencumbered by obligations or worries? This is part of a complete episode.
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In Kentucky, certain types of shiny, sporty motorcycles are often called “crotch rockets”.
Yes, it’s very common. I recorded “crouch rocket” because it’s a rarer variant.