Yes, the RAM Rampage is comparable to a Ford Maverick which is a unibody vehicle with a truck bed.

The massive truck they likely meant would be a RAM 3500 HD super crew cab full size bed Cummins diesel dually rear axle with a vertical dual stainless steel smokestack exhaust kit for good measure. Which is essentially the largest truck you can get with a pickup bed from RAM, GM, or Ford; and they go for over $100,000 with options.

There are even larger monstrosities with pickup beds built on top of 550/5500/Class 5 truck chassis which are basically a Canyonero from He Simpsons in real life: https://www.elevationoffgrid.com/

My favorite derogatory term for a vehicle type is ‘hausfrauenpanzer’ which means ‘housewife tank’ in German, which is used for a large SUV in Germany, lol.