Dutchman
n.— «Contractors have cut out letters or entire words from the granite and put in a blank plug, commonly called a Dutchman, for each correction. The next step will involve carving the corrected words into the granite.» —“Work begins to correct six errors on war memorial” by John Reynolds State Journal-Register (Springfield, Illinois) Oct. 5, 2005. (source: Double-Tongued Dictionary)
Further reading
After our chat about tongue twisters, a Chicago, Illinois, listener shares one that looks much easier than it sounds: Irish wristwatch. This is part of a complete episode.
Related
Michael from Jones, Michigan, says he was stationed on a U.S. Army base in Germany in the early 1960s. If there was a gust of cold wind, a fellow soldier would say the hawk’s out. This expression is largely associated with Chicago, Illinois...