chatter bump
n.— «The bump course is used primarily for suspension and structural durability evaluation. It has four test sections consisting of resonance bumps, impact bumps, chatter bumps and inverted chuck holes.» —“TRC Draws the Auto World to Central Ohio” by Robert T. Host in East Liberty, Ohio Columbus Business Journal (Ohio) Nov. 1, 1986. (source: Double-Tongued Dictionary)
Further reading
In Enough is Enuf: Our Failed Attempts to Make English Easier to Spell (Bookshop|Amazon), Gabe Henry recounts the story of the first national spelling bee in 1908, which some contestants had threatened to boycott because one of the contestants from...
Dan, an accountant in Cincinnati, Ohio, wonders about the origin of the term bean counter. This is part of a complete episode.
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