"Sheesh" is a slang term often used to express disbelief, annoyance, or frustration. While this expression may vary across regions and cultures, several synonyms can convey similar sentiments. "Gosh" or "goodness" can be utilized to express surprise or disbelief in a more mild manner. Similarly, "jeez" or "geez" can be used to display annoyance or frustration. In more profane contexts, individuals may opt for "damn" or "holy cow" to convey their exasperation or disbelief. These alternatives provide individuals with a range of options to express their emotions, allowing them to choose the one that best suits their intended level of intensity or politeness.