a long face

long face

A facial expression denoting sadness, dissappointment, or dissatisfaction. Jill had such a long face yesterday after she learned that she failed her exam. Hey, kiddo, why the long face? Is something bothering you?
See also: face, long
Farlex Dictionary of Idioms.

a long face

If someone has a long face, they look very serious or unhappy. He came to me with a very long face and admitted there had been an error. There were some long faces in Paris that day. Astoundingly, an American had won the Tour de France. Note: You can also say that someone is long-faced. After a short ceremony we stood, long-faced, by the graveside.
See also: face, long
Collins COBUILD Idioms Dictionary, 3rd ed.

(pull, wear, etc.) a long ˈface

(have) a sad or disappointed expression: I asked him if he wanted to come out but he pulled a long face and said no. Why the long face?
See also: face, long
Farlex Partner Idioms Dictionary
See also:
  • a long face, to wear/draw/pull
  • a turn of phrase
  • appear to
  • (one) can whistle for it
  • a change of heart
  • a mystery to (one)
  • able to do
  • able to do it
  • a shoulder to cry on
  • a piece of the action