The phrase "dealt one in" implies that someone has been included or included themselves in a particular situation or activity. Antonyms for this expression might include "left out," "excluded," or "omitted." These words suggest a sense of rejection or refusal, indicating that the person was not invited or chosen to participate in the situation at hand. Other antonyms could include "withdrawn," "retreated," or "disengaged," which suggest a deliberate decision to remove oneself from the situation rather than actively seeking to be part of it. Overall, there are many different ways to convey the opposite of being "dealt one in," depending on the context and tone of the situation.