Definition, Meaning & Synonyms
someone-is-one-sandwich-short-of-a-picnic
idiom
/ˈsʌmˌwʌn ɪz wʌn ˈsænwɪtʃ ʃɔrt ʌv ə ˈpɪknɪk/

Definition
A humorous phrase used to describe someone who is perceived as being foolish or lacking intelligence.

Examples
- The way he misinterpreted the instructions makes me think he’s someone who’s one sandwich short of a picnic.
- If she believes that conspiracy theory, she might be someone who’s one sandwich short of a picnic.

Meaning
This idiom suggests that the person is not quite right in the head, implying they are missing a critical piece of logic or common sense, much like missing a sandwich can make a picnic feel incomplete.

Synonyms
- not the sharpest tool in the shed
- a few fries short of a Happy Meal
- not playing with a full deck