There are the neck cranks, but that's got a fairly low chance of actually killing someone. There's the curb stomp, but that's hardly martial arts "move". I suppose a piledriver onto a hard surface could kill someone. Other than that there really aren't any moves I can think of that can realistically be considered lethal with any sort of consistency, despite the claims some less reputable martial arts sometimes make.
* heart (if you punch strong enough you will confuse the heart in a way where the single muscle fibers won't be contracting at once and thereby stop the blood circulation)
You're moving the goal posts, from "lethal" to "painful with a small outside chance of death or permanent injury". For the throat and solar plexus I can't even find any serious indication of them causing deaths in healthy individuals, and a strike to the heart is only really deadly for children and young teenagers. Hell all of those except the rabbit punch are perfectly legal in most full contact martial arts competition and hardly have a history of causing death or even serious injury. A solid Muay Thai kick to the head as a greater chance of killing than a strike to the solar plexus, and thousands of those land in sporting events every day without incident.
Yeah, it's not 100%
It's almost certainly not even 1%. If your martial art teaches that a move is "deadly" and the move isn't a blood choke, then they are almost certainly at the very least greatly exaggerating.
> Hell all of those except the rabbit punch are perfectly legal in most full contact martial arts competition and hardly have a history of causing death or even serious injury.
E.g. throat punches are considered fouls in UFC and K-1.
> It's almost certainly not even 1%. If your martial art teaches that a move is "deadly" and the move isn't a blood choke, then they are almost certainly at the very least greatly exaggerating.