When it comes to antonyms for the phrase "get impression," there are several words that come to mind. These words include forget, ignore, disregard, dismiss, and overlook. Each of these antonyms implies a lack of attention or consideration towards forming an impression about something or someone. For example, to forget something means that you didn't retain any information or impression about it, while to ignore something means that you consciously choose not to form an impression or pay attention to it. Disregard and dismiss both suggest a sense of disrespect or disinterest, while overlooking something simply means that you didn't notice it or form any impression about it, consciously or unconsciously.