but what the heck does Roll Trucks mean???????
It might mean nothing to a non-American, but for pilots and controllers, it's well understood. Consider us bilingual, if you will. I didn't understand most of the things said in another language when I was flying around the world. If this was an American airline and pilot landing in the UK, then your point would be much more valid.
Again, it's nothing that an American wouldn't understand
if heard correctly. However, the ICAO procedures are better. Blame instructors or training departments. Most US pilots don't learn ICAO "RT" until flying international.