DK
n.— «Of course there are the other 10 percent of passengers, what he calls the “frumps, humbugs, and nasties,” as well as the DKs (the police radio code for drunks, which Clements refers to as “the entertainment”).» —“Life down under” by Billy Baker Boston Globe Feb. 22, 2009. (source: Double-Tongued Dictionary)
Further reading
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The adjectives canine and feline refer to dogs and cats. But how does English address other groups of animals? Plus, cabin fever has been around much longer than the current pandemic. That restless, antsy, stir-crazy feeling goes back to the days...