Antonyms for the word "lucked out" can be challenging as it has several different meanings. If we consider it in the sense of someone's luck changing for the worse, antonyms could be "messed up," "had a stroke of bad luck," or "dropped the ball." However, if we use the term in the sense of someone being lucky or fortunate, antonyms could include phrases like "had a rough time," "faced hardship," or "endured hardships." Therefore, the antonyms for "lucked out" depend on its context and what the phrase represents. Ultimately, it's essential to understand the context of the phrase to determine the best antonym.