From the legal term TWOC ("taken without owner's consent").

twoc (twocs, present participle twoccing; simple past and past participle twocced)

1. (British regional, slang) To steal (especially a car).

• TWOC (British legal term)
• twoccer
• twoccing

From section 12 of the United Kingdom's Theft Act 1968 ↗, which states 'a person shall be guilty of an offence if, without having the consent of the owner or other lawful authority, he takes any conveyance for his own or another’s use or, knowing that any conveyance has been taken without such authority, drives it or allows himself to be carried in or on it'.

twoc

1. (British, law enforcement) The crime of taking a car without the consent of the owner.

twoc (not comparable)

1. (British) Of a car, taken without consent of the owner.

twoc (plural twocs)

1. Initialism of trans woman of color or trans women of color.
   • 2015, “Violence Against Queerfolk”, in Raix/zine, volume 1, number 2, page 9:

     There is no scientific or medical research to support "trans panic" theory, and this defence is nothing but a poor justification for committing violence against TWOC.

twoc (plural twocs)

1. (medicine) Abbreviation of trial without catheter