/bu: ||; bu/exclamation noun [C] (
plural boos)
1 a sound you make to show that you do not like sb/sth 嘘声（表示轻蔑）: The minister's speech was met with boos from the audience. 部长的演说惹来听众的一阵嘘声。
2 a sound you make to frighten or surprise sb 用来吓人的叫声:
He jumped out from behind the door and said ‘boo’. 他从门后跳出来，大喊一声“喂”。
boo verb [I,T]