We tried to help her, but she 'shooed' us away.
The horse is a 'shoo-in' to win the race.
a 'shoo-in for' the tournament/job/award
(..) I'm gonna get you. Mary. Mary... I'm gonna get you. I'm coming to get you. "Shoo, shoo," said the maiden. "Come, maiden," said the rabbit. "Sit on my tail and go with me to my rabbit hutch." No-ooo, no! No hanky-panky. (..)2003 House of 1000 Corpses