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Boo Definition

Verb: boo  boo

  1. Show displeasure, as after a performance or speech
    - hiss
Noun: boo  boo
  1. A cry or noise made to express displeasure or contempt
    - hoot, Bronx cheer [N. Amer], hiss, raspberry, razzing [N. Amer], razz [N. Amer], snort, bird
Interjection: boo  boo
  1. Exclamation used to startle or frighten
  2. Expressing disapproval