To be hit so hard the end result is landing on your ass, usually accompanied by some sort of injury or at the very lest momentaraly being disoriented. Usually accompanied by manic laughter by sadistic onlookers.
"The running back was running full tilt when the linebacker came out of no where and freakin plastered the guy so hard his helmet came off!"
Where a guy's balls are so sweaty, that his sack is "plastered" to his legs. Having ones balls "plastered" usually results in having to peel the nut sack off of the inside of the leg when one itches his nuts or pisses.
"Dude, it's like a damn sauna in here, my nuts are plastered."