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.
"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