beat
n.— «When officers came up empty, Ross told them Slater’s friend sold him a bag of weed that turned out to be “beat,” which is “street lingo for a counterfeit substance.”» —“The week in crime” by Chris Faraone Weekly Dig (Boston, Mass.) Mar. 23, 2005. (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...
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...