fell off the back of a truck

The phrase "fell off the back of a truck" is commonly used as a tongue-in-cheek euphemism or idiom to describe goods or items that are obtained or acquired in an illegitimate or questionable manner. It suggests that the goods were likely stolen or acquired through some form of illegal activity, possibly involving a stolen truck or illicit practices. It is often used humorously to imply that something was acquired without proper authorization or payment.