Dictionary
moop
moop noun, Aust.
[Acronym from 'man out of phase'.]
Someone disoriented by changing patterns of light and dark in polar regions, a sort of high-latitude version of jetlag.
12 June 1959 Bechervaise, John (1963) Blizzard and fire: a year at Mawson, Antarctica Angus and Robertson, Sydney: 90.
His [sc. Widdows] abiding contribution to ANARE parlance is the word moop, noun and verb, meaning "man out of phase" with the relentless dictates of time.
1980 (1957) Geo [Aust.] 2(3): 56.
At that latitude it was not clear when day ended and night began, the sun never quite dipping out of sight. Some men fell victim to the unusual phenomenon, becoming "moops", "men-out-of-phase", who slept during the day and emerged at night to wander the decks and lounge in the wardroom totally disoriented.
The Antarctic Dictionary, Hince, 2000; 232