Extremely irrational or unreasonable, insane, crazy.
Used as an intensifier, particularly for insane or synonyms.
Nonsense, horseshit; especially when said by or attributed to someone irrational.
Fecal matter produced by bats.
Extreme irrationality or unreasonableness, insanity, craziness.
Mad, insane, eccentric.
Camp fever; by extension, madness, eccentricity.