have got all (one's) marbles

have got all (one's) marbles

To be mentally sound or stable. Now that I've gotten a good night's sleep, I'm starting to feel like I've got all my marbles again. Grandma still has got all her marbles, in spite of her other health problems.

See also: all, have, marble

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.