Fangirl soul mate. Someone you've met (most of the time online) who seems to fangirl over the EXACT same things you do, almost like you're the same person!
I was talking about Fringe last night with a girl who had the exact same opinions on the show as me - we're fangirl soul mates!

My FSM and I spend all last night freaking out over the Rizzoli & Isles season finale
by RedVines41319 January 14, 2012
Get the FSM mug.
FSM (Forgetting Sarah Marshall): either the best or the worst movie you will ever watch.
Dude, FSM totally spoke to me, it was a great movie!!!
by wowowowcaliente December 17, 2009
Get the FSM mug.
Finite State Machine - Acronym for a logic circuit which has only a specific number of outputs depending on the input.
Our computer is an example of a finite state machine (FSM)
by Paul Hamilton November 14, 2005
Get the FSM mug.
FUCKING SHOOT ME

When your boss have stupid and redundant requests for a project that basically makes your life hell and have you cussing all day...but you have to censor yourself because you are at the workplace so you have to settle for acronyms.
That request is not even necessary, it just means more work for me, that stupid POS FSM!!!
by RCkiller October 15, 2011
Get the FSM mug.
noun;acronym for being in "FUCKING SCIENTIST MODE"; often induced by alcohol or by intellectual beat downs bestowed upon a grad student by their adviser.
Sorry bro, no time to talk, I'm in FSM after I drank a pitcher of margaritas at La Fiesta tonight. I might actually have a shot at getting out of this hell hole if I can get some of these protocols approved.
by SASbandit January 24, 2012
Get the FSM mug.
Flaka, Smartass, Malicious
a group of 3 friends that are so badass but each of them have their own personality
These three girls are SO FSM.. They are so opposite from eachother.
by SmartassofFSM April 3, 2009
Get the FSM mug.