What shout Ulfric used to kill the high king? They discribe it as "shouted him apart" just wondering if they ever specify.

Not AFAIK - at least, I've not seen any indication in game that it's specified. Since most of those who discuss the issue are "common folk" - it's not likely they WOULD know the shouts by name. And I haven't been sufficiently interested to look it up on the wiki....

I don't think they reveal that in the game...

I got to thinking, you know those times when you are suposed to say something but you say something else because you thought of something else?
Yeah, what if that would happen to dovahkiin, let's say he is about to shout a wall apart with fus ro dah to escape a room/get through the wall, and he thinks of the whirlwind sprint shout and says that instead and flies right into the wall and dies... It both sounds and looks funny as hell when i imagine it... Hilarious

So think before you speak holds a special meaning to the dovahkiin

Well, I thought he did a Fus Ro Dah and then put a sword through the High Kings gut, but I could easily be wrong.

I have done this. I mean, I thought I had fus do rah selected but I had whirlwind spring selected, and went off a cliff. It was lovely.

I was thinking unrelenting force too but iv never see anyone get "shouted apart" with it

He used Unrelenting Force, the whole "shouted apart" thing was an exaggeration as some characters/guards will admit when pressed.

If you speak to Ulfric he will tell you what happened. What the guards say is pure exaggeration. While Ulfric DID use a shout, it probably just knocked the High King back and allowing Ulfric to do the killing blow.

He used the disarm shout and then thrust his blade into his heart.

On the loading screen, it states he "nearly shouted him to pieces" (paraphrasing).