Expression of exasperation

The clue “Expression of exasperation is SHEESH” is referring to the common colloquialism, “Sheesh!” This word is typically used as a way to express frustration or exasperation in response to something that has happened or been said. The word itself is a shortened version of the word “Jesus,” which is sometimes used as an exclamation of surprise or frustration. When someone says “Sheesh!” they are conveying a sense of annoyance or irritation, often in response to a situation that has not gone as planned or as they had hoped. It is a versatile expression that can be used in a variety of contexts, and is a common feature of informal spoken language.