batshit.
Fecal matter produced by bats.
Meaning & usage
Fecal matter produced by bats.
Extreme irrationality or unreasonableness, insanity, craziness.
Where this word comes from
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.
Extremely irrational or unreasonable, insane, crazy.
Don't take any courses from that professor. She's completely batshit.
Where this word comes from
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.
Used as an intensifier, particularly for insane or its synonyms.
When we heard about it he went batshit nuts.
Where this word comes from
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.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.