When Donald Trump and Sen. Ted Cruz got into a Twitter feud over their wives earlier this week, some old-fashioned slang was thrown into the mix.

Mr. Trump issued a threatening tweet Tuesday night after he took issue with an advertisement funded by an anti-Trump super PAC that featured a nude photo of his wife Melania: “Lyin’ Ted Cruz just used a picture of Melania from a G.Q. shoot in his ad. Be careful, Lyin’ Ted, or I will spill the beans on your wife!”

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