Because they want you to get off the stage.
cheer
if it was in wales most of the people in the crowd would be welsh so they would go for their team and boo their opponents
boo
Boo!
In Hawaiian, "boo boo" could be translated as "hau'oli" which means "sore" or "injured."
"Tengo un boo-boo." or "Tengo un dolor."
Peek a boo
"No me ignores boo"
they normally say how yummy bananas are.☺
because 'boo' is something u say when u jump out to scare somone
poo peee poo plop
It is easier for children to say