The phrase "Well I never" is often exclaimed when someone is in complete disbelief or shock over something they have just witnessed or heard. However, for those looking to add some variation to their vocabulary, there are several synonyms that can be used interchangeably with this phrase. "You've got to be kidding me" or "I can't believe my eyes/ears" convey a similar sense of astonishment. Additionally, expressions like "Unbelievable!" or "Incredible!" can be used for a more concise reaction. While these phrases all capture the element of surprise, they can be effectively employed to express one's disbelief in a more varied and colorful manner.