Definitions
informal or slang terms for mentally irregular
Word origin
From Bat(man) + -s (hypocoristic suffix).
Used in a sentence
“You must be bats to go out in the cold without a coat on.”
“"Don't be so bats, Binns! Why should anyone want to pinch just one boot?" "He might have been a chap with only one leg."”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer2 curated clues
01“Cave flyers”4 letters
02“Flying mammals”4 letters
Not quite right?
"Search similar patterns."
B___