Now, if these teens and tweeners think they've broken new ground with this "6-7" number thing, take a number and have a seat.
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slang
Slingin’ Slangy Acronyms…
But "slang" also applies to "acronyms", an abbreviation formed by the initial letters of other words and pronounced as a word.
Baby Boomer Slang and then Some…..
Buzzwords and catch phrases change through the years
Johnny on the Spot 