play with a full deck
To behave in a manner suggesting that one is of normal intelligence, alert, and mentally stable.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“He says strange things, so I doubt he is playing with a full deck.”
“After hearing his bizarre plan to fix the broken engine with tape and glue, I began to wonder if he was playing with a full deck.”
“The witness gave such a disjointed and irrational account of the evening that the detective privately questioned whether the man was playing with a full deck.”
- 01
child's play
Something particularly easy or simple.
- 02
come full circle
To make a complete change or reform.
- 03
few cards shy of a full deck
Mentally deranged; demented; insane.
- 04
full blast
Maximum capacity or effort
- 05
full butt
headfirst with full force
- 06
full circle
Through a cycle of transition, returning to where one started after gaining experience or exploring other things.
- 07
full marks
Complete approval or agreement.
- 08
full of beans
Energetic and enthusiastic.
Last updated August 10, 2026