If you have never been in the United States before, it willseem to you that slang is another language you need to learn. But Americans can teach you slang words. Asel Shilikbaeva says that her host brother teaches her slang. Do not be afraid to ask questions. Nobody will say that you are an importunate person.
Questions are a good way to learn something or about something.
Try to never lie to Americans. Very often they do not accept lies. From childhood Americans are taught to tell the truth. Some international students have had an experience with not telling the truth. Usually it is not a pleasant experience.