For those not in the know, FML, well the first letter is obvious, the second two stand for "My Life".
Urban Dictionary says:
When one is in a bad situation and needs to fill that agravated sigh in with a word.
"dude i think your mom is making out with that guy again."
"fml....not again."
It is also made popular by the website http://www.fmylife.com a popular website, where people post their embarrassing stories. They all start with Today and end with FML.
Some golden recent posts include: Today, I bought a "I love my boyfriend" t-shirt so people wouldn't think I'm single. I'm very single. FML
It would be good to see some "FMLs" from people on here.