adjective: meaning "after irony". Modern style of art or fashion that follows a phase that was ironic. Being sincere or earnest as opposed to flippant and sarcastic.
Lucky, a graphic novel
by Gabrielle Bell:
"Lucky" is also a startling achievement: a coming-of-age tale -- from hipster Williamsburg, no less -- told without a whisper of irony."
quote is from article:
Coming of age in a post-ironic black-and-white world
By Matthew Shaer, Globe Correspondent November 25, 2006