few sandwiches short of a picnic Synonyms
a few clowns short of a circus
one's elevator doesn't go all the way to the top
his driveway doesn't go all the way to the road
one fry short of a Happy Meal
one brick short of a full load
one card shy of a full deck
few cards shy of a full deck
a few spanners short of a tool box
a few fries short of a Happy Meal
a few cents short of a dollar