Green’s Dictionary of Slang

1. a frock [cite 1893 is poss. double entendre ref. to almond n.¹ (1)].

1893		J. Tabrar [perf. Marie Lloyd] Buy Me Some Almond Rock 🎵 I shall say to a young man gay / If he treads upon my frock / Randy Pandy, sugardy candy / Buy me some Almond Rock.
1979		R. Barker Fletcher’s Book of Rhy. Sl. 21: She then began removing / Her full-length almond rock.

2. (also almonds) in pl., socks.

1917		W. Muir Observations of Orderly 228: The new army more feebly dubs them ‘almond rocks’.
1920		Queenslander (Brisbane) 27 Mar. 3/5: ‘Almond rocks’ for socks.
1930		(con. 1920s) D. Mackenzie Hell’s Kitchen 216: It was not often we had to use socks when we were out on a job. Fancy paying sevenpence each time for a pair of ‘almond rocks’.
1932		‘P.P.’ Rhy. Sl.
a.1945		L. Payne private coll. n.p.: Socks Almond Rocks.
1959		I. & P. Opie Lore and Lang. of Schoolchildren (1977) 344: ‘Almond rocks’ for socks.
1959		J. Gosling Ghost Squad 25: Thieves’ argot, spoken properly, is a foreign language which needs to be learned [...] Among the words and phrases derived from rhyming slang are: [...] ‘Almonds’ equals almond rock (sock).
1969		S.T. Kendall Up the Frog 12: ’Is plates o’ meat pen and ink. ’Is almond rocks must be reels of cotton.
1972		J. McNeill Old Familiar Juice (1973) 82: dadda: You forgot me socks [...] Almond rocks .
1976		(ref. to 1930s) R. Barnes Coronation Cups and Jam Jars 104: I’ve worn out Gawd knows how many pairs of Almond Rocks.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 17: Almond Rocks Socks.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Almond rocks. Rhyming slang for socks.
2002		Pete’s Aussie Sl. Home Page 🌐 almond rocks: a pair of socks.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 6/2: almond rocks n. socks.
2019		P. Baker Fabulosa 288/2: almond rocks socks.
2023		R. Milward Man-Eating Typewriter 133: Filled with rotting munja, dirty almond-rocks, luppernail clippings [...] dead rats and French letters.