knob knocker
n.— «“Imagine a razor shaving your face, but on a much bigger scale,” says Shawn McKinney, president of the Springfield Area Mountain Bike Association about the knob knocker, a device created to shave the bumps off a mountain bike trail.» —“Smooth moves” by Chris Young State Journal-Register (Springfield, Illinois) June 26, 2004. (source: Double-Tongued Dictionary)
Further reading
Asthenosphere, a geologist’s term for the molten layer beneath the earth’s crust, sparks a journey that stretches all the way from ancient Greece to the author of Uncle Tom’s Cabin. Plus: What the heck is a dogberg? It’s when...
Some TV commercials launch catchphrases that stick around long after the original ads. The exclamation Good stuff, Maynard! is still a compliment almost 40 years after it was used in a commercial for Malt-O-Meal hot cereal. And: what do you call...