boo /buː/exclamation 2verb 3noun 4forms 4phrases 1 exclamation2 •a shout of strong dislike from an audience at something such as a show or a gameI ask them to record their votes in my favour, and I ask, is there any man who will dare to call me a stranger (hear, hear, and booing)? — 1852 •A loud exclamation intended to scare someone. Usually used when one has been hidden from the target, and then appears unexpectedly. verb3 •To shout extended boos derisively.When he took the podium, the crowd booed. •To shout extended boos at, as a form of disapproval or derision.The protesters loudly booed the visiting senator. •(Northern-England, no longer used) To make a sound characteristic of cattle; to moo.The cow's tether is put about the neck of the individual who has lost the cow, and he must go about booing like a cow till atonement is made. — 1850 noun4 •A derisive shout of the word 'boo' made to indicate disapproval....Hodgson headed down the tunnel with the boos of fans ringing in his ears after an eighth league defeat of the season... — 2010 •(US, slang) A close acquaintance or significant other.At night I think of you / I want to be your lady, maybe / If your game is on give me a call, boo / If your lovin' strong, gonna give my all to you — 1996 •(slang) Cannabis.[…] sexually promiscuous girl who smoked boo all day and socialized with junkies when she wasn't busy banging away in bed […] — 1967 •A tail feather from an ostrich.White Boos declined 10s. to 15s. per lb.; Femina Boos 2s. 6d. to 5s. per lb., and drab Boos about 2s. 6d. per lb. — 1891 formsboo'd · booed · booing · boos Phrases with boo boo upTo start a romantic relationship with someone.