coin
n.— «Although Bill Kristol hails the surge as a triumph of “counterinsurgency strategy” in his Time piece, genuine experts say it’s anything but “strategy.” Counterinsurgency, or “coin” in military speak, is holistic. What’s happening in Iraq is anything but.» —“Counterinsurgency for Dummies – and Chickenhawks” by Briam Palmer Huffington Post Aug. 18, 2007. (source: Double-Tongued Dictionary)
Further reading
If you work in tech support, you might use snarky slang for problems caused by computer users themselves. There’s the acronym PEBCAK, for example, which stands for Problem Exists Between Chair and Keyboard. And: a lush poem about the sea inspired by...
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
I wonder whether there might not be a missing hyphen there–“co-in”–or whether maybe it’s closed up through use to rhyme with “join”…