have one's head screwed on right

have (one's) head screwed on (right)

To have sound judgment. I'm not surprised that Melissa invests most of her paycheck instead of spending it frivolously because she's always had her head screwed on right.
See also: have, head, on, screw
Farlex Dictionary of Idioms.

have one's head screwed on right

see under have a screw loose.
See also: have, head, on, right, screw
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • have (one's) head screwed on (right)
  • have your head screwed on
  • big ticket
  • big-ticket
  • the roof caves in
  • the roof falls in
  • keep from
  • keep from (doing something)
  • keep from doing
  • spend money like a drunken sailor