Green’s Dictionary of Slang

1. usu. in pl., the legs.

1857		‘Ducange Anglicus’ Vulgar Tongue.
1873		Sl. Dict.
1886		Marshall Pomes 23: But some buds of youthfull purity, with undisplayed Scotch pegs [F&H].
1895		Era (London) 28 Sept. 15/2: Mother’s got gout / In the corner of her new Scotch peg.
1908		‘Doss Chiderdoss’ ‘Disaster Averted’ Sporting Times 23 May 1/3: I don’t say [it] [...] / Wouldn’t suit some slim-built donah, if she ’appened to possess / Nicely-shaped ‘Scotch pegs’.
1915		‘Doss Chiderdoss’ ‘Glasses’ Sporting Times 23 Jan. 1/2: The canine emerged from between his ‘Scotch pegs’.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 252: Scotch Pegs: Legs.
1938		(con. 1900s) in J.B. Booth Sporting Times 88: Her landlord’s misfortune was that he / Only boasted of one Scotch peg.
1960		J. Franklyn Dict. of Rhy. Sl.
1969		S.T. Kendall Up the Frog 12: She ’ad a skirt up to her fife ’n’ drum, but a lovely pair of scotch pegs.
1981		P. Wright Cockney Dialect and Sl. 105: Scotch pegs ‘legs’.
2001		M. Coles Bible in Cockney 39: His Scotch pegs were huge.
2019		P. Baker Fabulosa 297/2: scotches legs.

2. in pl., eggs.

1984

Partridge DSUE (8th edn) 1022/1: occ. [...] C.20.