boots on the ground n.pl. personnel deployed under military command. Editorial Note: Boot dates to before World War II as indicating a military recruit or a green enlisted man. (source: Double-Tongued Dictionary)
Further reading
The Very Hungry Caterpillar (Bookshop|Amazon) had an earlier title: A Week with Willie the Worm. This is part of a complete episode. Transcript of “The Very Hungry Caterpillar’s First Title” Here’s another book title that didn’t make it, A Week with...
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...