to not play with a full deck
01
to lack intelligence or rationality
![to {not} [play] with a full deck definition and meaning](https://cdn.langeek.co/photo/42148/original/?type=jpeg "to {not} [play] with a full deck definition and meaning")
Idiom
Informal
Exempel
After his strange explanation for the missing files, it's clear he's not playing with a full deck.
I would n't take financial advice from him; he seems like he's not playing with a full deck.
