RichThesaurus
round the bend
vs
two sandwiches short of a picnic
round the bend
prep
Crazy, mad or insane.
Close to or in close proximity to another location.
two sandwiches short of a picnic
How often have the words
round the bend
and
two sandwiches short of a picnic
occurred in a corpus of books?
(source:
Google Ngram Viewer
)