have bats in one's belfry
To be crazy or eccentric.
Anyone declaring himself Emperor of San Francisco probably had bats in his belfry.
ADJ.
afraid, dark, full, many, over
VERB + BATS
associate, don't, eat, hated, think, thinks, wonder
BATS + NOUN
belfry, binns, birds, cats, cleanup, echolocation, mammals, reptiles
PREP.
in, on, out, with, with, without
ADV.
usually