In so-called memes and vines, I've seen sentences such as "People be like", "Boys be like", and so on. Every time, I wondered how be was in those particular sentences. Grammatically, how can be be in such sentences in that way?
My assumption, is it like subjunctive [should] be? Are is and are not used because using them would make the sentence determinative, whereas [should] be would make the sentence suggest possibility?