"Most lulu" is an informal English phrase that means extremely or exceptionally good or impressive. It can be challenging to find antonyms for this phrase as it is an idiomatic expression. However, some suitable antonyms for "most lulu" are "worst," "terrible," "awful," "poor," "mediocre," "unsatisfactory," and "disappointing." These words denote the opposite of something that is exceptionally good or impressive. For instance, if something is "terrible," it is unpleasant, distasteful, and not worth experiencing. Thus, while "most lulu" is an expression of admiration, its antonyms convey the opposite meaning of disapproval or condemnation.