IRJ (also IRJO) is an old and well-known acronym. In the SNL skit with Tina Fey and Amy Poehler on Sep 13th, Poehler as Hillary Clinton says "dont refer to me as a FLIRJ. I googled what it stands for and I do not like it."
Yea compared to Hillary. She's a real FLIRJ.
Amy Poehler as Hillary Clinton: "And don't refer to me as a 'FLIRJ.' I Googled what it stands for and I do not like it."
Now everyone is Googling "flirj" and no one seems to know what it means, but it would make sense for it to mean (in contrast to "milf" and as a desciption for the mean things people say about Hillary Clinton):
Fat Lesbian -- I'd Rather Jack-off
2. First Lady I'd rim job
2. Laura Bush is a Flirj. I'd eat that ass for hours