Antonyms for "the whole shebang," meaning everything or the entirety of something, could include phrases like "part," "partial," "fraction," or "select." These words suggest something that is incomplete or not whole. For example, if someone were to say, "I only got a fraction of the whole shebang," they would be indicating that they have only obtained a part of what they were looking for. Alternatively, phrases like "some," "piece," or "portion" could also be used to contrast with "the whole shebang," as they indicate a smaller amount or part of something larger.