Green’s Dictionary of Slang

1. electricity, esp. as a utility; thus fiddle the lecky, to cheat on one’s electricity bill.

1890		Farmer Public School Word Book 124: Lecker, subs. [...] 2. (Harrow).—The electric light.
1940		M. Marples Public School Slang 69: lecker: electric light.
2000		N. Griffiths Grits 69: Fire’s ee only light, no fuckin leccy yer, fuck no.
2001		N. Barlay Hooky Gear 43: I reckoned he would sort me, being just another ex-con, / With a bed, with brekkie, / A bit of en suite and free lekkie.
2006		D. Mitchell Black Swan Green 371: Checking windows, one last time, checking the lecky.

2. an electrician.

1984		V. Darroch On Coast 96: Lekky: Ship’s electrical engineer.
2001		N. Barlay Hooky Gear 57: All them geezers, builders, penny-a-dozen subcontractors, plumbers, roofers, Situsec crews, chippies, lekkies, humpers, glaziers, cowboys, bodgers an odd-jobbers buildin an repairin whole towns.