Some hipster is going on about their favorite band. You could just ignore it and walk away, but what are you - a mature adult? Please. Obviously you want to out-do that jerk, because making friends is for chumps.
Just type in the name of whatever musician they're talking about, and this app will provide you with a convenient insult to rudely throw in their face, regardless of whether they're saying an artist is good or bad. It works because of the two laws of hipster music talk: Make incredibly specific references, and always disagree, no matter what.
DEVELOPERS: You the man, FORK SUMTHIN