Letters that make bats
s, a, b, t are letters that make 'bats'
1 possible definitions for 'bats'
Under this definition, bats is an adjective and has the following properties:
buggy, dotty, haywire, daft, nutty, balmy, barmy, batty, bonkers, cracked, crackers, fruity, kooky, kookie, loco, loony, loopy, nuts, round the bend, around the bend, wacky, whacky have the same meaning as 'bats'
odd fellow, queer bird, queer duck, odd man out, addle-head, addlehead, birdbrain, loon, kook, craziness, flakiness, odd fish, daftness are derivatives of 'bats'.
insane is similar to bats.