Hello beautiful, (wuaooo) is an expression of astonishment or surprise in my country Venezuela, it is not that it belongs to our mother tongue, rather it is an idiom adapted from other cultures, sorry for not telling you exactly which one at the moment I ignore it.
In my writing I congratulate you and all those who had honorable mention in @Ladiesofhive and I give you my blessing. Happy week fraternal embrace from Venezuela.