"unimaginable consequence" is a grammatically correct phrase and can be used in written English.
Example: The decision to not heed the warnings about climate change could result in unimaginable consequences for our planet.
Baron Cohen responded by releasing a video in character warning of "unimaginable consequences" if he was not allowed to attend.
It's Democrats who are warning the country about the unimaginable consequences of default, and many Republicans who are minimizing it.
In 2009 special envoy Richard Holbrooke warned Prince Mohammed bin Nayef of "unimaginable" consequences for Saudi Arabia if Pakistan fell apart, especially if its nuclear weapons fell into unfriendly hands.
Because France is not France without Arab oil, Chirac has suddenly taken to threatening Saddam with "war of unimaginable consequences" unless he disarms right away, and France will soon dispatch an aircraft carrier to the gulf.
"While I applaud the Academy for taking away my rights to free speech," he said, "I am outraged at being banned from the Oscars by the Academy of Motion Picture Arts and Zionists!" If they do not give him back his tickets, he warned, they will face "unimaginable consequences".
There is a one-in-ten chance of the world being 6C warmer than it is today by 2100 which would lead to cataclysmic changes in the global climate with unimaginable consequences for human civilisation, leading climate researchers have warned in an "Earth Statement".
ETC Group, an international watchdog that has raised complicated questions about synthetic biology since its earliest days, also warns of the potential for "bio-error": what unintended and unimaginable consequences might result from deploying all these freely reproducing, totally novel organisms into the world?
"While I applaud the Academy for taking away my right to free speech, I warn you that if you do not lift your sanctions and give me my tickets back by 12pm on Sunday, you will face unimaginable consequences," says Baron Cohen as Aladeen, dressed in military uniform and flanked by armed guards.
There would have been unimaginable consequences.
Otherwise, acting prematurely against Iran would have disastrous global consequences for which only Israel would be blamed and suffer unimaginable consequences.
