have all one's buttons(redirected from be missing some of one's buttons)
have all one's buttons
Also, have all one's marbles. Be completely sane and rational. For example, Grandma may be in a wheelchair, but she still has all her buttons, or I'm not sure he has all his marbles. These slangy expressions date from the mid-1800s, as do the antonyms lose or be missing some of one's buttons or marbles , meaning "become (or be) mentally deficient."