shut up and color
v. phr.— «Veteran Cathcart and rookie George endure considerable ribbing from the fraternity of airline fliers. Cathcart has been subjected to every lawyer joke ever uttered, while George, as the new kid on the block, is “supposed to just shut up and color.”» —“Reservists Reach For The Sky In 2nd Jobs” by Laurie Sullivan Salt Lake Tribune (Utah) Apr. 18, 1994. (source: Double-Tongued Dictionary)
Further reading
Why is boxing called the sweet science when it’s obviously such a bruising sport? Also, a mother of five is baffled when her Gen Z kids use words she thought she knew. For example, they call sweatshirts sweaters, and declare that’s so aesthetic...
Matt in Beloit, Wisconsin, reports that when he was in high school back in the 1990s, he and his friends used the word biscuit in phrases like I feel like a biscuit or I bet you feel like a biscuit now, the idea being that someone said something...