What is mwah or muah?

Mwah or Muah is an onomatopoeic expression. It's used to represent the sound of a kiss being blown, often accompanied by a gesture of puckering the lips and extending a hand or fingers towards the recipient.

It is most often used in informal communication, such as texts, emails, and social media posts. It can also be expressed verbally during in-person interactions. The term is generally considered lighthearted and affectionate. Its purpose is to express affection, love, gratitude, or general friendliness.

The spelling can vary, with "mwah" and "muah" being the most common variations. The use of multiple "a"s can extend the sound for emphasis, like "mwaaah".

The gesture and expression are frequently used in popular culture, including film, television, and social media. It's sometimes used in a playful or ironic way as well.