A sense within someone that allows them to detect an unjustifiable hatred for the normal and love for irony in others. Also known as a hipster radar.
John: Hey, Jake, did you see Trig's final good-bye tumblr post? He totally bashed the very followers which made his online networking a way to learn and grow when he said "Tew mani ppl in dis pl@ce. im sew ovr it." Ironic, eh?
Jake: Totally. My hipsdar went off on him the day he made that tumblr.