Oh snap, someone knew the term at least!

"Giant robots." he says proudly, fists on his hips. "Giant freakin robots." Though he was sure that not everyone could really get the scale of size without reference, so he looks around for a building and points at one that's several stories tall, in the distance. "Some of them as big as that, some bigger." he says,

"Then we'd use them to fight of giant monsters and evil folk and save the world."