Grinch-sized load

A large pile of random things, usually in the bed of beater truck, tied down so poorly & arranged so precariously that you're sure that, while driving behind it, something will fall off, crack your windshield or cause major damage to your vehicle.
Any truck so full of junk & miscellaneous items that when pass them,you expect to see the Grinch at the wheel & his dog Max running in front to keep the whole thing going.

Lynne: Look at that truck with the swing set, 3 bikes, sheet rock, a fridge, mattresses held down by a twist tie!
Dalton: What were they thinking, hauling such a Grinch-sized load!