"Uy" is a Filipino expression commonly used to express surprise or shock, similar to "oops". However, there are several synonyms that also convey the same emotional response. One synonym is "whoa", which is commonly used in the English language to express surprise, shock or sudden excitement. Another synonym is "oh my" which expresses a similar sentiment to "uy" but with a more prolonged and emphatic sound. "What the" can also be used as a substitute for "uy", conveying surprise mixed with disbelief. Lastly, "wow" can function as a suitable substitute for "uy" while also indicating excitement and admiration. These synonyms can help individuals communicate their emotions more effectively.