hash
n.— «I served as a boatswains mate aboard the USS Yorktown from 1964-68. We called our underwear “skivvies” and the hard to wash out parts on laundry day were called “hash marks” (After the stripes on uniform sleeves denoting time in service, which are also called this.)» —“Skivvies” by jackalope47 Wordorigins.org Nov. 2, 2002. (source: Double-Tongued Dictionary)
Further reading
When Marilyn from Boston, Massachusetts, used the expression Them’s the berries! with neighbors in her hometown of nearby Arlington, Massachusetts, she was surprised they were unfamiliar with it. The phrase means something like “That’s...
“Are we ready to order yet?” Why do restaurant servers use the word “we” when they’re not eating with you or helping you pay the bill? And a story of Cold War intrigue: A young saxophone player’s clever ruse to smuggle information past KGB...