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