The phrase "got drift" refers to understanding or comprehending a situation fully. The antonyms for this phrase could include words like confused, unable to understand, or ignorant. These antonyms can be used to describe a lack of understanding, knowledge, or comprehension. For instance, if someone is not able to grasp the meaning of a complex topic, they can be said to be confused about it. Similarly, someone who lacks knowledge about a specific subject can be described as being ignorant. Thus, using antonyms can help to convey the opposite meaning of "got drift" and highlight a person's inability to understand or comprehend something.