Yeesh! is an expression of surprise, disbelief, or dismay. It is often used as an interjection to express shock or dismay at something unexpected. OOF is an acronym for Out Of Focus, which is a term used in photography and cinematography to describe a shot that is not in focus. UGH is an expression of disgust, frustration, or annoyance. BOYOHBOY is an expression of excitement or enthusiasm, usually used to emphasize the magnitude of something.