1. yah boo - Adjective
2. yah boo - Interjection
yah boo
(Britain) An expression of derision or scorn.
I don't care about your stupid party anyway, so yah boo to you.
yah boo (not comparable)
Characterised by derision or scorn.
People are fed up with yah-boo politics.
yah-boo
Alternative form of yah boo
yah-boo