Keiva, I don't know what those other acronyms Faldage noted stand for, but here's what the Newfoundland Dictionary says about the Newfoundland use of the word wop(NOT the same as the general use):

wop2 n Volunteer worker from other countries doing odd jobs at the International Grenfell
Mission, Labrador.
[1917] 1972 GORDON 99 Due to arrive any minute ... were a species known as WOPS.
They represented the unskilled Volunteer force that Grenfell gathered in from the
universities and other sources of supply. They willingly undertook all the odd jobs that
were so necessary to the running of the Hospitals, such as stoking, digging, unloading
freight, or anything else. 1920 WALDO 145 'Bill' Norwood—one of the volunteer 'wops'
building the Battle Harbour reservoir. 1941 WITHINGTON 170 The work of these 'wops,'
the word for the aides who came in the summer WithOut Pay, was very
desultory—unloading cargoes of supplies, sorting clothes and arranging them for sale,
and doing odd chores. P 130-67 ~s: summer workers, usually students, who work at the
Grenfell Hospital without pay.

It came up because of another definition under "bay":

bay wop: contemptuous (city) term for an 'outport' Newfoundlander (P 245-56).
1970 JANES 146 She was originally a young baywop whose family had recently moved
to Milltown and settled there. 1979 O'FLAHERTY 175 'Baywops' [in Janes' novel, House
of Hate] are generally seen ... as semi-retarded and contemptible.

Just wanted to clarify a bit, since I don't think either of us had posted the definitions we were discussing.