The phrase "got in on" typically means to become involved or participate in something. Some antonyms for this phrase could include opting out, abstaining, or staying out of the action. Other antonyms could include withdrawing, sitting on the sidelines, or refraining from involvement. These antonyms suggest a lack of interest or willingness to participate in a given activity. Whether someone chooses to get in on the action or not can depend on a variety of factors, such as personal preference, skills, or the perceived risks and rewards of getting involved. Ultimately, it is up to the individual to determine whether they want to get in on the action or not.