disappear, etc. into thin air

disappear into thin air

To vanish completely and without a trace. I would give you my stapler, but it seems to have disappeared into thin air.

See also: air, disappear, thin

disappear, etc. into thin ˈair

disappear, etc. suddenly and in a mysterious way: The money vanished into thin air. Nobody knows what happened to it.

See also: air, thin