The phrase "what is that" is a common English expression used to ask about the identity, nature, or purpose of an object, person, or situation that is not immediately known or understood. It is often said when someone sees or hears something unfamiliar and wants clarification or information about it. In a general sense, "that" is a versatile word in English used as a determiner, pronoun, conjunction, and adverb to refer to a specific thing or idea that is often distant from the speaker or listener or to introduce clauses. When combined as "what is that," it functions as a question focusing on identifying or understanding "that" particular thing.
Additionally, in popular culture, "What is that?" is sometimes featured as a reaction to surprising or confusing situations, as seen in viral memes and social media content, exemplified by Cardi B's popular phrase use expressing astonishment or curiosity.
If the query concerns a specific object, phrase, or context beyond general usage, more details would help provide a targeted explanation.
