freight dog
n.— «Prince said Gross had been a flight instructor and a “freight dog” for the company for four years. A freight dog is a term for a pilot who flies cargo.» —“Pilot in plane crash identified” Pantagraph (Bloomington, Illinois) Nov. 10, 2005. (source: Double-Tongued Dictionary)
Further reading
There are eight major planets, but more than a million minor ones, including asteroids. If you discover one, you get the honor of naming it. The Dictionary of Minor Planet Names includes minor planets named for rock bands, jazz musicians, poets, and...
Sam in St. Charles, Illinois, says that when he mentioned a big old water tower nearby, his mother corrected him, saying the water tower wasn’t old, it was new. Can’t you use big old or big ol’ in that way? Of course you can! The...