square
n.— «Everybody makes money off “squares,” the derogatory term for amateur bettors Vegas types use only privately for fear of offending customers.» —“Football bettors put billions on the line” by Michael McCarthy in Las Vegas USA Today Sept. 7, 2005. (source: Double-Tongued Dictionary)
Further reading
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...
While reading Great Expectations (Bookshop|Amazon) by Charles Dickens, a listener in Arlington, Texas, is surprised when one of the characters inherits some money, which Dickens describes as a cool four thousand. Were they really using cool that way...