facial expression used in chatrooms.
similar to O_O or O_o is used when the chatter is shocked, surprised, grossed out, confused or just plain creeped.
The large 'O' symbolizes a big eye looking right at you, and the little dot '.' represents the eye that is farther away, as if the face were on an angle from you, observing you closely, shocked at what you just said (typed)
"OMG! did you hear that Brittney and Shane are going out!"
" O_. noo.....ew, really?"
"OH MAN! i think i'm gonna fail french."
"O_. that's not good!"