Batshit

//ˈbæt.ʃɪt// adj, adv, noun, slang

adj, adv, noun, slang ·Common ·High school level

Definitions

Noun
  1. 1
    Fecal matter produced by bats. literally, uncountable, vulgar
  2. 2
    Extreme irrationality or unreasonableness, insanity, craziness. slang, uncountable, vulgar

    "Yvette Cooper, the shadow home secretary, suggested Cleverly had previously privately referred to the Rwanda plan as “batshit”, a jibe not explicitly denied by Cleverly."

Adjective
  1. 1
    Extremely irrational or unreasonable, insane, crazy. slang, vulgar

    "Don't take any courses from that professor. She's completely batshit."

Adverb
  1. 1
    Used as an intensifier, particularly for insane or synonyms. not-comparable, slang

    "When we heard about it he went batshit nuts."

Example

More examples

"Yvette Cooper, the shadow home secretary, suggested Cleverly had previously privately referred to the Rwanda plan as “batshit”, a jibe not explicitly denied by Cleverly."

Etymology

Presumably from batty (“crazy”), itself from earlier have bats in one's belfry, from tendency of bats to fly around erratically. Possibly influenced by or derived from apeshit, particularly in phrase go apeshit.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.