The term 'social opener' can refer to a variety of different things. The crossword solution for this term is 'ANTI, ' which is a prefix meaning 'AGAINST' or 'opposing.' It is often used to describe someone or something that is AGAINST a certain idea, belief, or practice. For example, an 'ANTI-war' activist would be someone who is AGAINST war and works to prevent it. In the context of social openers, it could refer to someone who is AGAINST traditional methods of starting conversations, such as small talk, and instead prefers more meaningful conversations.