not playing with a full deck

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not playing with a full deck

1. Not mentally sound; crazy or mentally deranged. A: "Look at that guy talking to himself on the corner." B: "I reckon he's not playing with a full deck."
2. Not very bright or intelligent; dimwitted. Jim's a nice guy, but with some of the foolish things he does, I wonder if he's not playing with a full deck.
See also: deck, full, not, play
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

not playing with a full deck

mentally deficient. North American informal
A deck in this phrase is a pack of playing cards.
See also: deck, full, not, play
Farlex Partner Idioms Dictionary © Farlex 2017
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