What does this facial expression mean?

[Anonymous]

I've been given this expression on occasion

Just curious

[msc545]

It means "I am not so sure what you just said is correct"

[NotTacocaT6969]

It usually means “wtf is wrong with you?”

[Asker]

I ask because a few gals would give me this the more we would either run into each other &/or interact by force (school)

[In_Trance]

depends on the context

[jjj101010]

Itchy nose