Jinx!

Jinx!

interjection Said after two people unintentionally say the same thing at the same time. A and B: "Where's Mom?" A: "Jinx!"
Farlex Dictionary of Idioms.
See also:
  • jinx
  • oh really
  • whiz
  • gee whiz
  • my, my
  • my, (oh, my)
  • cool
  • hear, hear
  • hear, hear!
  • bonus