Used to describe one who has no common sense, nor is booksmart. Also describes a person whofreaks out when they don't understandsomething
Someone walks up to him and says "Do you know where Mcyd's is", and he says "I have no clue, what the hell is your problem", then the asker says "Jesus, McMental."
Definition: A person who lives deeply in the present and wants to enjoy every single moment in a unique way. (वह व्यक्ति जो वर्तमान में जीता है और हर पल का अलग तरह से आनंद लेना चाहता है।)