batty
AdjectiveWordNet 3.0
Webster's Dictionary (GCIDE)
Batty \Bat"ty\ (b[a^]t"t[y^]), a.
1.Belonging to, or resembling, a bat. "Batty wings." --Shak. [1913 Webster]
2.Crazy; demented; loony; nuts; as, her constant gabbing is driving me batty. [Colloq.]
Syn: bats. [PJC]