What is O_0?

What Does O_0 Mean?

Ever stumbled across O_0 in a chat or comment and wondered what it meant? You're not alone. This quirky little symbol is part of a family of text-based emoticons known as kaomoji—Japanese-style emoticons that use keyboard characters to express emotions in a more nuanced, often playful way.

At first glance, O_0 might look like a typo or random symbols, but it’s actually a face. The "O" represents one wide open eye, and the "0" is the other—usually wider, skewed, or unblinking—giving off a vibe of shock, confusion, or disbelief. Think of that moment when someone says something totally unexpected, and you just stare, wide-eyed. That’s O_0.

It has siblings: 0_o and 0.o, all variations on the same theme. Sometimes the "0" replaces the "O" as the larger eye, depending on typing style or platform. The subtle differences are part of the charm. These symbols don’t just show emotion—they add personality. A simple “What?” in text feels flat. Add 0.o and suddenly there’s tone, skepticism, maybe even a hint of sarcasm.

Kaomoji like this one became popular in early internet culture, especially in forums, chat rooms, and Japanese messaging apps. Unlike Western-style emoticons like :) or :O, kaomoji are typically viewed upright and often more detailed—sometimes even including arms or actions. But O_0 stays minimal, which is why it’s so effective. Less is more when you're trying to capture that split-second reaction of "Wait, what did you just say?"

So next time you’re stunned into silence by a wild comment or bizarre news, consider saying it without words—just drop an O_0. It says it all.