As an interjection yaroo
is variant of yarooh.
As a noun yazoo is
(us) a tributary that runs parallel to a river (especially when separated by a natural levee).
yaroo
English
References
* OED 2nd edition 1989
Anagrams
* yazoo
English
(yazoo stream)
Noun
(
en noun)
(US) A tributary that runs parallel to a river (especially when separated by a natural levee).