I think "dragging it in" refers to the practice of setting up a
landing configuration far from the touchdown point, and then applying
lots of power to overcome the high drag configuration to make the
runway.

My experience with the term was this: during dual as a student pilot I
screwed up my angle of descent on a short field landing attempt. I was
using the a touch down point marking, well into the runway, as the
spot where I was supposed to put down. My instructor said, "You'll
have to drag it in to not land short of your aiming point."

Whereupon added power (not full), shallowed the descent angle to
almost level, and "dragged it in" to the touchdown point marker.

It was a craptastic landing, and illustrated much of what has been
discussed.