How do you say No in Australian?

Watching the Australian mermaids (and their love interests) on H2O, I'm having flashbacks to my trip to Australia and trying to perfect my fake Australian accent... the "No" is one of the hardest parts.

It's sort of pronounced like... NAWrooh.

For instance, if you go to 00:48 in this clip...

"Did you tell Miriam that I wanted that locket?"
"NAWrooh!"

Do you think Australian accents are kinda hot, very hot, or anti-hot?