What is Boo Hiss?
When something has gone wrong, is very bad or most disagreeable.
"I got caught with the vicar's wife again Alex."
"Oh Boo Hiss."
"I have Aids."
"That is mucho Boo Hiss!"
"And United have scored!!"
"Boo!!!! Hiss!!!!"
See boo, hiss, bad, rubbish