The phrase "hit big" refers to achieving great success, fame or fortune. The antonyms for "hit big" would include phrases such as "failed miserably", "missed the mark", "fell short", "struggled to stay afloat" and "lost everything". These phrases all convey the opposite meaning of achieving success, instead suggesting a lack of success or even a complete failure. While it's never pleasant to experience failure, it is often through our setbacks and struggles that we learn and grow the most. So, even if you don't hit big, know that there are always lessons to be learned along the way.