Meaning of “shoo” - Learner’s Dictionary

shoo

verb uk us /ʃuː/ (present participle shooing, past tense and past participle shooed)
shoo sb away/off/out, etc

to make a person or animal leave a place by chasing them or shouting 'shoo' at them

shoo exclamation

(Definition of “shoo” from the Cambridge Learner’s Dictionary © Cambridge University Press)