Argie, n. — Green’s Dictionary of Slang

Argie n.

[abbr. + sfx -ie; coined 1982 by Britain’s Sun newspaper, as part of its jingoistic approach to the Falklands War (1982)]

an Argentinian.

1982		Sun [London] 21 Apr. [headline] British Warship Sunk By Argies.
1986		Daily Mirror 23 Aug. 6: Julie Christie has been signed to play the lead in an Argentinian film which has now been retitled Miss Mary. The original title gave both Julie and the Argies the heebie-jeebies. It was called Miss Maggie.
1992		(con. 1982) V. Bramley Excursion to Hell 131: The A Company lad in charge shouted at the Argies to get up and move.