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2.
Home team fans at a sporting event who boos one or more members of the home team because of the team playing bad.
The boo birds are out tonight.
by stanley2toronto September 28, 2011

Words related to boo birds

boo anger birds birds. coach fans officials officiating team
 
1.
The sound of disgust coming from a crowd at a sporting event after something they didn't like happens.
The sports announcers reported, "That questionable call by the officials brings out the 'Boo Birds'."
by ChrisDoc November 10, 2009
 
3.
Ugly pants.
Damn Laura look at Alex's 'boobirds'!
by your mother April 16, 2003