shoo
exclamation
[ ʃuː ]
• a word said to frighten or drive away a person or animal.
• "‘Shoo,’ said Mrs Beavis to her girls, and the passage emptied"
shoo
verb
• make (a person or animal) go away by waving one's arms at them, saying ‘shoo’, or otherwise acting in a discouraging manner.
• "I went to comfort her but she shooed me away"
Origin:
a natural exclamation: first recorded in late Middle English. The verb use dates from the early 17th century.