shoo

• POS: Interjection, Verb (usu participle)

CIDE DICTIONARY

shoo, interj. [Cf. G. scheuchen to scare, drive away.].

 Begone; away; -- an expression used in frightening away animals, especially fowls.  [1913 Webster]

OXFORD DICTIONARY

shoo, 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.

Idiom

shoo-in US something easy or certain to succeed.

Etymology

imit.