Green’s Dictionary of Slang

(S.Afr.) an affirmative excl.

1936		C. Birkby Thirstland Treks 273: Wragtig! We live in wonderful times!
1959		J.M. Meiring Candle in the Wind 30: Look how fat she is! Wragtig!
1987		L. Beake Strollers 16: ‘Wragtig, hey!’ he said in amazement.