Made famous by JR (Jim Ross) of WWE. Used to describe a pro wrestling match that was bound to turn into a slugfest either due to the size and strength of the competitors, the level of heat generated by a feud leading up to the match, or both.
Brooo trashpuss was so slobber-knocked last night that she scratched her clam ditch, sniffed it, and the stank of her own brand hit her so hard she came out of a 6 minute nod off the aytch!!