FMGWAC 

An acronym standing for Fuck Me Gently With A Chainsaw. Used when cursing one's situation, or after making a dire mistake. Sometimes used as an alternative to fuck me or FML.

Jesus, my house burned down and i still have to file those reports by tonight, FMGWAC.

Shit! I told my boss to go fuck herself, fuck me gently with a chainsaw!

or I just marched for 8 hours, fuck me gently with a chainsaw!

FMGWAC by Ausgezeichnet August 25, 2009

FMSWAC 

Acronym meaning "Fuck Me Sideways With A Crowbar".

Used to convey extreme displeasure with a turn of events, or when something doesn't go according to plan. Not usually used as a command.

Pronounced "Ef-Em-Swack".

"Dude, your girl just dumped you over a Facebook status."

"FMSWAC..."

FMSWAC by fmswac December 29, 2009

FMWACS

Common acronym for the phrase "Fuck me with a chainsaw".

Person 1: I'm so busy between work and school I don't think Ill be able to make it to hang out tonight.

Person 2: Damn! Alright then. Sucks that you have that much work.

Person 1: I know... FMWACS right?

FMWACS by Csw444 October 22, 2014

FMSWACBP 

Acronym. Fuck Me Sideways With A Concrete Barge Pole.
Commonly used to express that what you are about to say is important, relevant, or otherwise unbelievable.

a) FMSWACBP I wish China would stop fucking around!
b) You can't be serious, FMSWACBP!
c) Your mum is hot, FMSWACBP

FMSWACBP by Fung Dunnel August 8, 2022