boo

boo · interjection

imported

Definitions

interjection

  1. 1.

    An exclamation used to express disapproval or contempt.

  2. 2.

    An exclamation used to surprise or startle someone.

  3. 3.

    A shout of disapproval or contempt.

  4. 4.

    [informal, North American]A term of endearment for a boyfriend or girlfriend.

  5. 5.

    To express disapproval by shouting "boo."

Forms

plural: boos

Phrases & expressions

  • •
    boo-hoo — to cry or pretend to cry
  • •
    wouldn't say boo to a goose — (of a person) very timid

Related words

Antonyms: applause, cheer
See also: booing, hiss, jeer
Synonyms: hiss, jeer

Etymology

Of imitative origin, first recorded in the early 19th century. The frightening "boo" may be older, possibly related to similar sounds used to startle.