He acts like he is a few cards shy of a full deck.
few cards shy of a full deck
idiomMentally deranged; demented; insane.
After hearing his strange theories about the moon, I suspect he is a few cards shy of a full deck.
The villagers whispered that the eccentric hermit living in the woods was a few cards shy of a full deck, given his habit of talking to the trees.
- 01
come full circle
To make a complete change or reform.
- 02
fight shy
To avoid meeting at a close distance or at close quarters; to keep out of reach, to avoid.
- 03
full blast
Maximum capacity or effort
- 04
full butt
headfirst with full force
- 05
full circle
Through a cycle of transition, returning to where one started after gaining experience or exploring other things.
- 06
full marks
Complete approval or agreement.
- 07
full of beans
Energetic and enthusiastic.
- 08
full of hot air
Talking a lot, especially without saying anything of value or meaning.