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
References in periodicals archive ?
Turning 50 may have focused his mind on mortality, but anyone who thinks Mikhail Baryshnikov is going gentle into that good night isn't playing with a full deck.