PHWOAR!!!!!!
If you've watched any of the modern Britcoms on PBS, you've probably heard the phrase, but aren't familar with the spelling.
Might sound like "Whoaa" or some such to American ears, but is a phrase uttered when you see someone you fancy. Usually good-looking, muscley, buff, fit, trim, busty, etc.....
As for Mr. Jackman, you should have seen him on Broadway doing show based upon the life of the late Peter Allen, "The Boy From Oz.
Phwoar Indeed!