idiom. 1) Go batshit. 2) Go apeshit.
Related terms: nuttery, fucknutter.
Real citation: "'A mystery,' continues Sloane, circling his prey. 'The true secrets of his creations will always be held back from you…THE UNWORTHY!' He growls that last part as he brings the base down yet again on Baldy's head. And again. And again. And blood spatters up onto his face. And a wham! And another wham! And more blood and oh my god, he's thrown a nutter."
(Erin, "Another Mister Sloane," page 13, Television Without Pity, http://www.televisionwithoutpity.com/story.cgi?show=75&story=7853&page=13&sort=&limit=)
Made-up citation: "I'd rather throw a nutter than pitch a hissy-fit, because I am very manly and testosterone-engorged."