batshit

Definitions

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

Equivalents

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.”

CEFR level