fmlm is an acronym/abbreviation for "fuck my life mondays". It is a negative feeling/mood at the start of the start of the school/work week, typically caused by exhaustion and dread of the labour to come. The term is similar to having a "case of the mondays" and opposite to the term TGIF "thank god its friday"
Its monday morning, the coffee machine is broke, your boss is on your case and your extremely exhausted from the weekend. fmlm.
A combination of FML (Fuck My Life) and LMAO (Laughing My Ass Off), to be used when your life is shit, but somehow you find it funny even though it sucks .
Person 1: Someone stole my bank pin and now I'm out 5k