rivet
n.— «An apprentice ironworker who does jobs such as running for coffee and getting tools for the journeymen. Rivet: Another nickname for an apprentice.Rivet: Another nickname for an apprentice.» —“Chicago Speak” by Anne Keegan Chicago Tribune Feb. 3, 1994. (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...