show one’s butt
v. phr.— «Showing his butt: A term used by officers to describe an inmate who is mouthing off or complaining about his treatment. As in: “That inmate was showing his butt.”» —“What the lingo means” by Adam C. Smith, Jo Becker St. Petersburg Times (Florida) Dec. 30, 1999. (source: Double-Tongued Dictionary)
Further reading
People who hunt treasure with metal detectors have a lingo all their own. Canslaw means the shreds of aluminum cans left after a lawnmower ran over them. And gold dance? That’s the happy jig you do if you find something far more valuable than...
Debbie from Crawfordsville, Florida, says that when she and her husband reach an impasse while working on something, they’ll say Let’s grok about it, which they use to mean “Let’s think about it.” Grok was coined by...