piggyback tax
n.— «Mr. Cohen said he’s never supported a cell phone tax or boosting the county’s portion of the income tax, often called the piggyback tax.» —“Negative ads fill last days of campaigns” by Jeff Horseman The Capital (Annapolis, Maryland) Nov. 5, 2006. (source: Double-Tongued Dictionary)
Further reading
It’s hard to imagine now, but there was a time when people disagreed over the best word to use when answering the phone. Alexander Graham Bell suggested answering with ahoy! but Thomas Edison was partial to hello! A fascinating new book about...
The autocomplete function on your phone comes in handy, of course. But is it changing the way we write and how linguists study language? Also, suppose you could invite any two authors, living or dead, to dinner. Who’s on your guest list and...