batshit

adjective
bat·​shit | \ˈbat-ˌshit\

Definition of batshit 

vulgar slang

: very irrational, excited, or angry : crazy entry 1 Some say he's smart and some say he's permanently batshit—but they don't say it to his face … . Besides, most truly talented people are, well, strange.— Linda Ellerbee, And So It Goes, 1986 This tended to drive the real Hollywood people … absolutely batshit. — Jay McInerney, The Guardian (London), 3 Nov. 1996 often used with go … she shows you that you are not alone in the world, … lets you know that everyone goes batshit sometimes, and that recovering from it can lead you to expectations and views that translate to a new life, a better life.— Sridhar Pappu, The Atlantic, January/February 2005

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Other Words from batshit

batshit adverb
Joey is aware that there are a lot of people, … who are just batshit crazy. — David Brooks, Weekly Standard, 28 Apr. 2003 … over the years he's been called everything from ruthless to batshit insane … — Seth Mnookin, Vanity Fair, December 2008

First Known Use of batshit

1971, in the meaning defined above

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The first known use of batshit was in 1971

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