Definition of bonkers
a : very fond, enthusiastic, or excited She's bonkers for/about opera. He's bonkers for/about her. The fans went bonkers when their team won.
b : very angry, annoyed, or bothered Faced with the choice of being driven bonkers by their colicky newborn or inviting an outsider into their lives, Phil and Julie sanely decide to find a nanny. — Booklist And the internet went completely and utterly bonkers about it, with critics climbing over one another to criticize Cyrus …— Tom Hawking
c sometimes offensive : having or showing severe mental illness Meanwhile, the greedy trustees of her fortune are trying to confuse her enough to have her declared bonkers so they can make their jobs permanent.— Ray Olson
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
You're (Probably) Saying It Wrong
18 words even you might be mispronouncing
Great Big List of Beautiful & Useless Words
Along with their degrees of usefulness
12 French Phrases from Downton Abbey
Many of us have an 'idée fixe'
Words For Things You Didn't Know Have Names
When 'thingamajig' and 'thingamabob' just won't do
Ask the Editors