Bats
来自Big Physics
early 20th century: from the phrase have bats in the belfry (see bat2).
wiktionary
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
Bat(man) + -s(hypocoristic suffix)