oops paint
n.— «I wanted to do some interior painting, but a good can of paint or two is a little more than I could afford. I noticed what my paint dealer labeled as “oops” paint set to the side. It was paint that he made a mistake mixing.» —“What to do when cleaning a ceiling is a tall order” by Al Carrell, Kelly Carrell Dallas Morning News (Texas) Jan. 20, 1995. (source: Double-Tongued Dictionary)
Further reading
Ian in Jacksonville, Florida, wonders about why musicians use the word clam to mean “a mistake” or “an egregious musical error,” as in There are a lot of clams in there or We need to practice where the clams are regarding a...
Quiz Guy John Chaneski has crafted a quiz involving a polysyllabic word followed by another word that repeats the last of those syllables twice. For example, suppose the clue is: “When playing a simple game with a toddler, it’s a real...