off the back of a lorry

off the back of a lorry

Likely by illegal or dubious means. (Said of the way something has been gotten.) Primarily heard in UK. A: "Jake's been peddling a bunch of flat screens for a great price." A: "He probably got them off the back of a lorry. I wouldn't go for them, if I were you." Danny says he has several laptops and smartphones he wants to sell for cheap—sounds like they fell off the back of a lorry to me.
See also: back, lorry, of, off

off the ˌback of a ˈlorry

(British English, informal, humorous) goods that fell off the back of a lorry were probably stolen. People say or accept that they came ‘off the back of a lorry’ to avoid saying or asking where they really came from: Where did you get a new DVD player at a price like that? Off the back of a lorry?
See also: back, lorry, of, off