The Full Monty is a phrase that refers to the complete or whole package of something. The term originated from a British comedy movie in 1997 where characters in a strip club were encouraged to take off all their clothes, giving the audience "the full monty."
The antonyms of "the full monty" could be "partial," "incomplete," or "unfinished." These words describe things that are not entirely fulfilled or lacking in some way. For example, a meal that is only partially cooked, a job that is left unfinished, or a person who is incomplete without the support of others.
In summary, "the full monty" represents the entire package or complete set of something, while its antonyms, such as partial, incomplete, and unfinished, indicate a degree of incompleteness or inadequacy.