RichThesaurus
a few fries short of a Happy Meal
vs
few cards shy of a full deck
a few fries short of a Happy Meal
few cards shy of a full deck
adj
mentally deranged; demented; insane.
How often have the words
a few fries short of a Happy Meal
and
few cards shy of a full deck
occurred in a corpus of books?
(source:
Google Ngram Viewer
)