Fuck my shitty life, fuck my shitty life, Feel my sister's love. This is used by anyone who's unhappy about one's self or is going threw circumstances that make life suck. The other definition is just there if you wan to confuse many people.
"Dude, you know what, I hate my FMSL ."
"FMSL is so useless, wtf creator."
"Fuck FMSL, that's stupid as fuck."
Many examples for this word
"Fuck my scientific life" or "F my scientific life." A variation on FML specific to people who are relaying stories about the pains of working with experiments.
So, I spent a week aligning that machine, right? Well, the power went out and ruined my alignment. FMSL
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.