"Ugh" is an informal expression often used to convey feelings of annoyance, frustration, or disgust. It can be vocalized as a sound or written as a word, and it typically reflects a negative emotional response to a situation or experience. People might say "ugh" when faced with something unpleasant, like a difficult task or an irritating comment. This expression is commonly used in everyday conversations, social media, and text messages. It serves as a quick way to communicate dissatisfaction without needing to elaborate. The simplicity of "ugh" makes it a versatile tool for expressing a range of emotions in a relatable manner.