The term "goose step" refers to a notoriously rigid and highly stylized marching step used in military parades. Some potential antonyms for this phrase might include more relaxed and fluid movements, such as walking, strolling, or sauntering. Alternatively, antonyms could include more energetic and dynamic movements, such as running, skipping, or leaping. Other possible antonyms might include more unconventional modes of movement, such as dancing, twirling, or gyrating. Ultimately, the antonyms for "goose step" would depend on the context in which the term is being used, as well as the specific connotations and associations that are associated with it.