batshit

Etymology
Presumably from, itself from earlier , from tendency of bats to fly around erratically. Possibly influenced by or derived from, particularly in phrase.

Noun

 * 1)  Fecal matter produced by bats.
 * 2)  Extreme irrationality or unreasonableness, insanity, craziness.
 * 1)  Extreme irrationality or unreasonableness, insanity, craziness.

Adjective

 * 1)  Extremely irrational or unreasonable, insane, crazy.

Synonyms

 * See also Thesaurus:insane.
 * See also Thesaurus:insane.
 * See also Thesaurus:insane.
 * See also Thesaurus:insane.

Translations

 * Dutch:
 * Finnish: sekaisin kuin seinäkello
 * French:, , , ,
 * German:
 * Russian: ёбнутый,  , пиздану́тый

Adverb

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