The stinkface, of course.. what else?
(chuckles) Honestly, though, there aren't a whole lot of wrestling manuevers, at least in terms of professional wrestling, whose emulation would increase your chances of success in a shoot-fight.
Eight years ago, when home performance of professional wrestling moves was at a dangerous high, I can remember having many "matches" with my friends that would, sooner rather than later, involve someone intentionally not choreographing their moves (I hated being legit choked by my idiot friends who could just as easily have flexed their arm muscles and made it look just as real)
One of my friends, the exterior of his house had a handrail, that reached, by itself only about seven or eight feet off the ground; it seperated the house from his chained-up dog and was a perfect spot for a high-flying move; not too much room, or too little.
I remember lying there as I had seen superstars do it, with hands folded at the midsection to protect my ribs, when both of the friends I had been wrestling with, Bobby and Aaron, jumped from the handrail onto me, respectively imitating a splash and a Senton Bomb- though the Senton was really more of a tuck-and-roll in mid air that was far from as spectacular as the Hardy's, and the Splash was just brutal- especially considering that between the two was more around 400-500 lbs., and Bobby didn't get up before Aaron jumped either, leaving me on the bottom of the human pile-up.
Probably the most effective of wrestling moves would be either a form of submission (as most of these moves, with obvious exceptions like the Mandible Claw, were deriven from MMA-style sports) or a vertical strike ala The Great Khali or Umaga's finishers.
If my opponent was down, the "move" (if you could call this a move) that I would use is an old favorite among heels; I'd walk across their abdomen.
Every time I've seen a wrestler do that on TV, I cringed.
Especially with the bigger guys, cause that one or two seconds that the wrestler lifts his other leg off the mat, and all that leverage goes toward the downed opponent, is very painful.
Please. Don't try this at home.