int. & v.
--int. an exclamation used to frighten away birds, children, etc.
--v. (shoos, shooed)
1. intr. utter the word 'shoo!'.
2 tr. (usu. foll. by away) drive (birds etc.) away by shooing.
Phrases and idioms:
shoo-in US something easy or certain to succeed.
Etymology: imit.