Original definition: Foreigner - Someone who does understand how American society works. Nowadays it can mean just about anything. "Wow, ur so foreign." - Calling someone stupid or gay or something. Or, "Wow your so foreign!", as a compliment because they had a good idea or it can be like, "Im gonna foreign u in the face!' meaning, I'm gonna punch you in the face, or "Let's foreign" meaning let's fuck or lets go ect, or "Foreignocracy", politcal party. or "Foreignology" the study of all things foreign, and much more.
Kid 1- "Sebastian is so foreign"!
Kid 2- "I know, he doesn't understand society at all"!
Kid 1-"Wow, look who decided to be foreign..."