can drive a truck through something

can drive a truck through something

AMERICAN, INFORMAL
If you can drive a truck through something such as an agreement, contract or argument, it has serious weaknesses or faults. In my view, Miller's fiscal plan is so thin you could drive a truck through it. Note: You can also say that something has weaknesses big enough to drive a truck through. Clearly, there were loopholes in the system big enough to drive a truck through.