PAX
n.— «For example, promises replaced policies, executives are called “Big Shots,” and acronyms and slang, such as “UM” for unaccompanied minor and “PAX” for passenger, are completely forbidden.» —“Westjet Airlines—High Times” by Renée Alexander BusinessWeek Online May 10, 2006. (source: Double-Tongued Dictionary)
Further reading
What’s it like to hike the Pacific Crest Trail all the way from Mexico to Canada? You’ll end up with sore muscles and blisters, and great stories to tell. Along the way, you’ll also pick up some slang, like NoBo, SoBo, Yo-yo and...
The slang phrase someone ate and left no crumbs means the person did something really well. In a previous call, a listener who works in theater noted the use of ate to mean “did something well,” as in they really ate that haircut! This...