and few cards shy of a full deck; few cards short of a deck; not playing with a full deck; two bricks shy of a load
Fig. lacking in intellectual ability. (Many other variants.) Tom: Joe thinks he can build a car out of old milk jugs. Mary: I think Joe's a few bricks short of a load.Ever since she fell and hit her head, Jane's been a few bricks short of a load, if you know what I'm saying.Bob's nice, but he's not playing with a full deck.You twit! You're two bricks shy of a load.