over the fence
Unacceptable, objectionable, or inappropriate; unreasonable, immoderate, or exorbitant. Primarily heard in Australia, Canada. I found her use of vulgar language in the poem to be completely over the fence. Your proposals are way over the fence—there's no way we would be able to afford it!
over the fence
unreasonable or unacceptable. Australian & New Zealand informal 1964 Sydney Morning Herald Some publications which unduly emphasize sex were ‘entirely over the fence’.