Green’s Dictionary of Slang

1. (Aus.) a party.

1971		F.J. Hardy Outcasts of Foolgarah (1975) 202: The guests arriving at the Slyme house-warming ding.
1984		Partridge DSUE (8th edn) 309/2: since ca. 1958.
1984		Benjamin & Pearl Limericks Down Under 89: [S]he’s asked to all the best dings.
2003		McGill Reed Dict. of N.Z. Sl.

2. (US) a drinking spree.

1971

in Quarterly Journal of Studies on Alcohol XXXII 728: Ding: A drinking bout.