Green’s Dictionary of Slang

1. (Ling. Fr./Polari) a leg; usu. in pl.

1962		R. Hauser Homosexual Society Appendix 3 167: Lyles, legs.
1966		Took & Feldman ‘Bona Prods’ Round the Horne 16 Apr. [BBC radio] I see Samson as huge and all butch, with great bulging thews and whopping great lallies.
1972		B. Rodgers Queens’ Vernacular 129: lyles (Brit gay sl, fr Anglo-Chinese lai lo = come here) legs.
1991		(ref. to 1930s) in Porter & Weeks Between the Acts 138: Hands are lappers, legs are lallipegs, breasts are jubes, eyes are ocals or opals.
1999		M. Coward in Verbatim 24:2: Other named body parts include riah (simple backslang for hair); thews for thighs; and lallies for legs.
2003		(ref. to 1960s) Baker & Stanley Hello Sailor! 99: Shipmates might talk to each other in Polari about who was fanciable: their dolly eek (pretty face), bona riah (nice hair), fabulosa ogles (fantastic eyes) and shapely lallies (legs).
2019		P. Baker Fabulosa 294/1: lallie, lally, lall, lyle, lally-peg1. a leg.
2003		K. Cage Gayle.
2023		R. Milward Man-Eating Typewriter 18: [L]allies chained to the table-lallies.

2. (Polari) a knee.

2023

R. Milward Man-Eating Typewriter 4: The establishment brought to its lally-caps.