flex
v.— «Hagood wrote that he pointed the man to a known crack dealer and later the man drove back by to say that he had been “flexed,” a street term referring to tricking someone into buying a drug that is counterfeit.» —“Testimony begins in murder trial” by Eric Connor Greenville News (South Carolina) Apr. 14, 2008. (source: Double-Tongued Dictionary)
Further reading
Susie Dent’s murder mystery Guilty by Definition (Bookshop|Amazon) follows a lexicographer in Oxford who becomes a sleuth of a different kind, seeking the culprit in a long-unsolved killing. A lexicographer herself, Dent includes lots of obscure and...
In the US, if you step on a piece of Lego, you scream bloody murder; in the UK, you step on a piece of Lego and scream blue murder. Also, in the US, you eat scrambled eggs; in the UK, it’s scrambled egg. This is part of a complete episode...