Omai is a term used by many people in the English language to express surprise or admiration. It is generally used in the form of a question, asking "Omai?" or "What?," as if a person is surprised by something. It originated in Caribbean countries, where it is still used to this day.

In the US, its usage is often preceded by "Yo," as if to say, "Yo, what was that?" It is generally used in informal settings, such as among friends or family. It is also often accompanied by an expression of surprise, such as "Omai? Wow!