"extremely crazy" is a grammatically correct phrase and can be used in written English.
It is an adjective phrase used to describe something that is very wild, irrational, or out of control. Example: "The party last night was extremely crazy, with guests dancing on the tables and throwing confetti everywhere."
Until one day he came to this extremely crazy idea that the best way to look at the northern sky is actually to go to the South Pole.
"The truth is in the State of New York, you can be extremely crazy without being legally insane," Ronald L. Kuby, a criminal defense lawyer who has handled cases of mentally ill defendants, said Tuesday.
So, no party has done extremely crazy stuff because they don't want the other party to do so either later, until recently that is! There's also been an understanding that such filibusters are generally not too used except for the bigger posts like the court, as you point out.
A lot of people called, and they just wanted money, or they were just extremely crazy people.
"[Bruce] has got an extremely crazy amount of patience but he's also so secure in himself -- he's completely secure in his relationship with me".
I have a Sonic Forest, which is basically a forest of mental strings connected to some contact mics, and I get some extremely crazy sounds from that.
It's like having this extremely large, crazy family – like a weird circus family you travel around with – and you've really got to be into it because it's a really, really hard job but it's a really, really fun job.
The Queensland floods have been extremely fucking crazy.
"I expect it to be extremely loud and crazy.
"I've already gotten extremely lucky with crazy awesome things, like the challenge of playing with Yoko".
Expression without emotion is a jarring thing indeed, and in this case it manages to look both extremely unpleasant and crazy cool.
