O-o Definition

Alternative form of o_O.
Wiktionary

An emoticon representing a confused or surprised face.

Wiktionary
abbreviation

(nautical) Ore/oil ; designating that a ship can carry both ore and oil.

Wiktionary

Origin of O-o

  • To represent a face with one eye opened wider than the other, similar to raising one eyebrow.

    From Wiktionary