Cooee

[Jessica]

A peculiar whistling sound made by the Australian aborigenes
as a call or signal.

[Donald Trump]

[Cooee]! ([IPA] /[ku]:i:/) is a shout used in Australia, usually in the bush, to attract attention, find missing people, or indicate ones own location. When done correctly—loudly and shrilly—a call of [cooee] can [carry over] a considerable distance. The distance ones cooee call travels can be a matter of competitive pride. It is also known as a call of help, which can blend in with different natural sounds in the bush.

[Little_Girl]

Used to attract attention, especially at a distance.