Green’s Dictionary of Slang

docs n.

also Doc Martens
[brandname Dr. Martens, patented in Germany in 1965 by Herbert Funck and Klaus Maertens. The original boots were for work use only, but the firm diversified during the 1980s and their product, esp. in the form of a Dr. Martens sole attached to one of a variety of uppers, became a leading fashion staple for both sexes]

Dr. Martens boots.

[Ire]E. Mac Thomáis Janey Mack, Me Shirt is Black 72: Hush puppies, Doc Martins [sic], cowboy boots, desert boots.
[UK]J. Osborne Déjàvu Act I: His best furry pair of fourteen-hole Doc Martens.
[Ire]R. Doyle Van (1998) 369: It was just the look, the image she followed, the hair and the Docs.
[UK]A. Warner Sopranos 224: Fuck! he didn’t take me Docs!
[UK]Guardian G2 2 Feb. 3: Docs are more famous for protecting the feet of skins, punks, mods, new romantics, grungers, indie fans and new-age travellers.
[UK]Observer Rev. 14 May 11: Hattie [...] wears pink Doc Martens.
[Aus]S. Maloney Something Fishy (2006) 89: Tarquin clumped across the bare floorboards in his Docs.
[Scot]T. Black Gutted 19: My problem was footwear. My Docs were wasted, caked in blood and dirt.
[SA]IOL News (Western Cape) 10 Feb. 🌐 They will have all the metal heads and goths [...] dusting off their Docs.
[US]T. Robinson Rough Trade [ebook] Junior soccer-kicked him to the temple with his Docs.