I. shoo 1 /ʃuː/ BrE AmE interjection
[ Date: 1400-1500 ; Origin: Natural sound ]
used to tell an animal or a child to go away
II. shoo 2 BrE AmE verb [transitive always + adverb/preposition] informal
to make an animal or a child go away, especially because they are annoying you
shoo somebody away/out etc
He shooed the kids out of the kitchen.