The usually made-up tragic story that any drug addict/thief/hooker/bad person will tell you so you feel bad for them and will make you feel like it's not their fault that they are the way they are, or made the decisions that they made.
jenny: ugh suzy, look at you! you're fucked up on coke and it's 8 in the morning, and we're in spanish class!
suzy: Jenny, you don't even know what I've been through, I told you what happened...I found my mother dead when I was 8, then I was taken into foster care and beaten and I took to the streets where I became an anonymous circus dancer. You don't know how it feels to have no sense of identity!!!
jenny: oh, suzy, what a sob story...