monkey board
n.— «The men were injured when a finger came out of a monkey board knocking both men down and falling across them.» —“Two Men Injured In Oil Field Accident” in Raymondville Valley Morning Star (Harlingen, Texas) July 24, 1945. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Aubrey in Waco, Texas, says her mother used to warn the kids against contracting honkus of the bonkus, a fanciful name for a contagious disease. This colloquial term probably comes from the words bonk and konk, meaning “to hit” or...