Cool your jets, meaning calm down or take it easy, was already older than Kurt from Utah’s mid-1970s childhood near Edwards Air Force Base. The trail points back to the 1950s TV serial Tom Corbett, Space Cadet, whose rocket-age slang included plug...
diamond n.— «First sergeants are required to be at least a master sergeant to wear a diamond on their sleeve, which is why they are sometimes referred to as “diamonds.” However, technical sergeants may be selected to hold the...
