Aviation staff don't speak in whole sentences. Most words are abbreviated - it makes it easier to understand what is being said on radio. Whole conversations and situations that could take a few minutes to explain can be communicated in a matter of seconds.
Here, a Quantas staffer decodes some Aviationese, which is the second language of anyone who works in or around aircraft.
APU: Auxiliary Power Unit - small engine at rear of plane used to power the aircraft (lights, aircon, flight systems) when the aircraft's main engines - the ones on the wings - aren't running.
ATB: Air Turn Back - when the captain decides to return to the departure airport instead of continuing to the destination.
ACARS: Aircraft Communications Addressing and Reporting System, basically like an SMS system in the cockpit, except it works in the middle of nowhere.
CSM: Customer Service Manager - the most senior member of cabin crew onboard
CX: Cancelled. (Sorry.)
ETOPS: Extended range twin engine operations. This is approval for certain types of aircraft with two engines to fly long distances over water.
FOD: Foreign object debris - Any material on the airport taxiways and runways that could potentially damage the tyres of the aircraft. No one likes FOD.
J and Y: Business and economy class cabins respectively
NOTAM: Notice to Airmen - information for pilots on airports/air traffic control.
PAX: Passengers
RNP: Required Navigational Performance - a form of GPS in the cockpit, which allows aircraft to fly safely in low visibility.
TOGA: Take Off, Go Around - this is an aircraft throttle setting that basically means maximum power, and is used when the captain decides to abort a landing approach and try again (this can be for lots of reasons, including visibility, wind, or an obstacle on the runway).
UM: Unaccompanied minor, young person travelling alone
WX: Weather..