The stupid bullshit women read in their spare time; everything from trashy, soft-core (and slightly rapey) "romantic" novels, to Cosmo and self-help books. May include vampires, serene landscapes with big, sweaty farmhands, and coupons for Ben & Jerry's.
Girl: Is 50 Shades of Grey fiction or non-fiction?
Guy: Neither, it's illiterature.
Guy: Here, I bought you some illiterature to read at the beach
Girl: OMG, thank you so much I just CANNOT get over the Twilight series!