The phrase "bomb out of" is often used to describe an individual's failure in a particular task or activity. There are several synonyms for this phrase that can be used in different situations. For example, "fall flat" is a common expression that is used to describe someone's inability to succeed. "Fizzle out" can also be used in a similar context to indicate a lack of progress or success. Another synonym is "flunk," which refers to someone not passing a test or exam. Other phrases include "miss the mark," "come up short," and "crash and burn." Ultimately, these synonyms can help add variety and enhance the clarity of communication when describing someone's shortcomings.