Green’s Dictionary of Slang

1. to steal cars, usu. for joy-riding; thus twoccing/twocking n.

1999		Guardian G2 6: He liked twocking (stealing) cars, he got a buzz out of it.
2000		Guardian Space 22 June 22: Trashed blue Metro with the windows gone, front smashed in, a casualty of twoccing.
2005		B. Hare Urban Grimshaw 65: Frank and Skeeter left as soon as it was dark enough to go twocking.
2012		Eve. Standard 14 May 15/1: Suppose Timmy has been twocking cars again. What are you going to do about it?
2018		Twitter 12 May 🌐 Vaguely recalled boy I’d seen thru endless court appearances, probation, borstal, prison, all for TWOCing.

2. to steal, other than cars.

2005		B. Hare Urban Grimshaw 292: He kicked the bloke in the knackers and twocked his mobile phone.
2007		R. Milward Apples (2023) 111: I’d have to twoc a load more sportswear to afford another hundred [pills of MDMA].
2012		R. Milward Kimberly’s Capital Punishment (2023) 394: Sean doesn’t realise there’s a slug on that can. Fucking serves him right for twocking it.