The opposite of grammar Nazi. Grammar Hippies love all forms of language, whether it be slang or Shakespeare. They won't bash you or ignore you if you use slang in an informal environment. Some may speak it and join in, some may still speak to you in the same way they speak to other people and others will admit that they don't understand what you're saying yet they won't look down on you for it. They can admit that they too make mistakes when it comes to the standard form of their native language.
Person 1: Sup guys
Grammar Nazi: I think you mean "what is up." The sky is up, the birds are up.
Grammar Hippie: Chill, you know very well that he was saying "hello". Do we really need to discuss informal colloquialisms and why they exist.
One who is usually in a laxed and under control state but when someone uses improper grammer he is forced to lecture them and embarrass them infront of the company present.
Mike(Aka Grammar Hippie): Hello, Joel what will you be doing this evening.
Joel: im like going to the mall man what about you
Mike: You can't "like" got to the mall. You either go or don't. You forgot the capital I and the apostrophe in I'm. You forgot every single comma, which resulted in a run on sentence, and a comma splice.
Joel: why are we friends?
Mike: Oh, you also forgot the question mark.
Joel: FUCK YOU