Green’s Dictionary of Slang

old people, parents.

1883		W. Besant All in a Garden fair II 170: Young clever people [...] are more difficult to catch than the olds .
1979		Lette & Carey Puberty Blues 16: Is he gunna send a letter home to ya olds?
1988		McGill Dict. of Kiwi Sl. 79/1: olds parents; eg ‘What’s the big attraction with dope, anyway? Most of the olds smoke it.’.
1990		T. Winton Human Torpedo 26: Lockie’s olds got religion back when he was a baby.
2000		P. Howard Miseducation of Ross O’Carroll-Kelly (2004) 141: Have you told your olds?
2022		L. Inglis Twitter 8 Sept. 🌐 Take care of the olds, pals. They are where it’s at.
2024		Bluesky 5 May 🌐 They played plenty [i.e. of classic songs] for us olds.