To be square is to mean that you haven't kissed or made out with anyone, English and Welsh people may say that when you are square "you haven't necked anyone"
person 1: you still square mate?
person 2: Nah we necked last night.
Someone who is unaware of or oblivious to a specific subculture; one who "doesn't get it." A person afraid to go out of their comfort zone.
On the search for marijuana, Tim asked Fernanda if she knew where he could find some "Mary Jane" but she was such a square she thought Tim was looking for white girl named Mary that worked at Starbucks.
1.Square means to be basic and only into mainstream 2. Conventional and closed minded. To be set on one certain way.
1.Harper is so square all she drinks is pumpkin spice lattes from Starbucks, on her iPhone obsessed with Instagram.
2. Boss- Your a woman you will not be able to work at this business because we men are the brains.