The phrase "gotten the drift" refers to understanding the underlying meaning or intention behind someone's words or actions. Some antonyms for this phrase could include: misunderstand, misinterpret, misapprehend, misread, or misconceive. These words imply a lack of clarity or comprehension, indicating that the person did not grasp the intended message or purpose behind the communications. Other antonyms could include: disregard, ignore, overlook, or dismiss, which suggest that the person did not even attempt to understand or appreciate the subtleties of the situation. By using appropriate antonyms for "gotten the drift", one can convey the opposite sentiment and express a lack of understanding or awareness in a variety of ways.