1. go bananas - Verb
2. go bananas - Phrase
(idiomatic, informal) To get angry; to go mad.
I just told her she couldn’t have any pudding until after dinner, and she went bananas!
(idiomatic, informal) To become silly or excited; to go crazy.
Source: en.wiktionary.orgThere are still some terrible cliches in the presentation of Indian fiction. The lotus flower. The hennaed hands. In mainland Europe, people still slap these images on my books and I go bananas. Hari Kunzru
From his first climb up the ladder to the chilly Tropical Freeze, we go bananas for Nintendo’s lovable gorilla. Source: Internet
These same creators likewise go bananas when they cannot retrieve the works of their peers because of inadequate descriptions / metadata. Source: Internet