have truck with

back up the truck

To take advantage of favourable pricing by purchasing a large amount.

fall off a truck

Of an item of merchandise, to come into a person's possession without having been paid for; to be acquired illegally; to have been stolen.

fall off the back of a truck

Of an item of merchandise, to come into a person's possession through illegal or otherwise dubious means.

fall off the turnip truck

To be naive, uninformed, or unsophisticated, in the manner of a rustic person.

hit like a truck

To hit in an extremely powerful manner; to hit with a lot of force.