1 : batshit crazy : affected beyond lunacy : insane : delusional
2: a : exhibiting the abnormal state marked by believing something that is falsely or delusively believed or propagated
b : exhibiting a persistent false psychotic belief regarding the self or persons or objects outside the self that is maintained despite indisputable evidence to the contrary
She asserted things about her opponents that only a guanotic would think of.
He hatched a guanotic plot to overthrow the government.
another of her guanotic ideas