dusty, n.² — Green’s Dictionary of Slang

dusty n.²

[one of a set of words implying the physical disintegration of the body as one ages]

1. (US black) an old record.

1971

H.E. Roberts Third Ear n.p.: dusties n. old phonograph records; records no longer in vogue.

2. (UK society) a very old person, 70 years old and onwards.

1982

Barr & York Sloane Ranger Hbk 158: dusty n. Really old Sloanes, aged 70 to The Finish.