Everything that could possibly go wrong will. The only reason that this is sometimes true is because everybody that believes it has a really pessimistic view on life, and if you have a positive attitude good things will happen.
I called a girl up and asked her out on a date. I got diarrhea, I lost my job, my car crashed, I was 2 hours late, and when I got there she had already left on a date with another guy. So I came home, told my hot roommate, and we ended up fucking all night long.
by Buttfucked September 7, 2003
Get the murphy's lawmug. 
A romance between a father-in-law and a daughter-in-law. Which sometimes happens especially when his wife is a bitch to him and her daughter ,which is his daughter-in-law, at the same time.
by The Fury 13 November 21, 2010
Get the Father-in-law daughter-in-law romancemug. Anything bad that could happen, will happen. Frequently quoted by those who think the entire world is against them, just because their piece of toast never lands the right way up. Same people often use the phrase 'That's just fucking typical' (of the world and everyone's in its conspiracy to piss me right off).
by Eldritch September 4, 2003
Get the murphy's lawmug. To a computer programmer, the similarity between a clitoris and a segfault. To the programmer, both can be notoriously difficult to find, and offer great reward when found.
Jim: Dude, i can't satisfy my girlfriend!
Brad: Pretend her clit is a segfault.
Jim: You're advice worked great!
Brad: That's why it's Brad's Law!
Brad: Pretend her clit is a segfault.
Jim: You're advice worked great!
Brad: That's why it's Brad's Law!
by goodvikings November 30, 2009
Get the Brad's Lawmug. by Sven’s D June 21, 2018
Get the Lemon lawmug. by Oreomom July 29, 2015
Get the Trans-in-lawmug.