A term used to describe a time when you are having or have had a lot of bad luck or problems that are really messing your life up. When you feel like you have had more than your share of bad luck.
Joe: I just rolled my car so I wont be at the party tonight!
Greg: Man you are really having some bad luck! Didnt you just tell me you cut your arm off yesterday?!
Joe: Ya that right! Its Murphys gay law!
Greg: Man you are really having some bad luck! Didnt you just tell me you cut your arm off yesterday?!
Joe: Ya that right! Its Murphys gay law!
by txfarmboy May 10, 2011

When you select a locker in an empty locker room, the next person coming back to their locker will be right next to yours. If they happen to enter at the exact moment you're putting on your underwear, then their locker will be on the opposite side of you and they'll have to shuffle by uncomfortably close.
Me: (putting on underwear in the locker room)
Next guy: oh hi, I need to slip past you to get to my locker; hope you don't mind.
Me: No problem; it's Murphy's Locker room Law.
Next guy & Me: chuckle chuckle chuckle
Next guy: oh hi, I need to slip past you to get to my locker; hope you don't mind.
Me: No problem; it's Murphy's Locker room Law.
Next guy & Me: chuckle chuckle chuckle
by Grute Man August 27, 2017

Refers to the infuriatingly-common "lousy timing" occurrence of your seldom encountering the usually-hoped-for opportunities/pleasantries (i.e., neighbors relaxing on their front porches/lawns whom you can shoot the breeze with on your way by, pretty girls to hold hands with and "chat up for a few", sizable numbers of discarded returnable containers, etc.) whenever you're out for a stroll or otherwise leisurely traipsing around your local area on foot, yet when you either hitch a ride with someone or are "a man on a mission" in your own vehicle and thus you can't "acceptably" stop to avail yourself of any of these assorted "sidewalk delights", the roadsides you travel along will either be "chock-full of friendlies" or "Bottle/Can City", and so you'll be mentally "climbin' da walls" at having to agonizingly pass on by all of those much-desired goodies.
It was foggy and chilly when I started out walking around town to complete my weekly errands-list, and so there was hardly another soul outdoors, but then sometime later when I was riding back again with a neighbor who'd offered me a lift home, the weather turned clear and balmy again, and there were lots of smiley-faced sundress-clad cuties strolling the walks all over town! Guess it was Murphy's Pedestrian-Perks Law at work!
by QuacksO July 21, 2018

"You can hold onto something for decades, and neither you nor anyone else will ever have a use for it, but then just as soon as you throw it out, either you will suddenly need it for something, or --- even more 'painful' --- **someone else** will come to you and humbly ask, 'Do you happen to have an extra ___?'" Rrrrrggggghhhhh----!!!
I'd had a couple of old 55-gallon oil-drums stashed in da garage for da past thirty years --- my grampa had given 'em to me when he and Gram were downsizing to move into an assisted-living apartment --- and they'd just sat there and gathered dust in da corner all that time. But then just two days --- TWO STINKIN' DAYS!! --- after I'd sent 'em to da crusher for recycling, a low-income neighbor dropped by and asked me if he could have them to use as burn-barrels --- guess dat was a classic case of Murphy's Law of "Junk" at work!!
by QuacksO July 24, 2018

"You can leave a pitted/abraded/scratched/bubbled/discolored windshield in your car till 0%!$@&# Doomsday and it will never get hit, but then just as soon as you actually REPLACE said "ancient" glass wif a brand new one, THAT'S when you'll get a bleepin' BIG OL' PEBBLE tossed up by a passing vehicle, and star-crack your nice shiny-fresh windshield all to Hell!"
After several years I eventually got sick and tired of all da misty triplex-haze on my car's original-from-the-factory windshield, and so I finally replaced it --- wouldn't you know that the VERY NEXT DAY it got a huge crack in it after a rock got thrown up by the wheel of a passing dump-truck! Ahhhhrrrggggghhhhh... classic case of Murphy's Law Of Windshield-Damage, I guess!!
by QuacksO July 31, 2018

"You can stroll a store's aisles till Doomsday and never spot da item you want, but then, just as soon as you interrupt a staffperson to ask for help in locating said desirable, THAT'S when you will notice your sought-after item right off!"
While stocking up on food at a Super Walmart, I was looking for larger packages of Armour Vienna sausage so that I could save a few cents per can, but although I had thoroughly searched the surrounding areas on the shelves, I still hadn't found anything bigger than the small six-packs, so I finally asked a nearby employee if there were any of the larger packages in stock, possibly in the back room. Well, just as we were both walking back to the area of the aisle where I'd been looking, THAT'S when I finally spied the 12-packs that were sitting on the very top shelf! Guess that was a classic case of Murphy's Law of Customer-Assistance... ah, well, again, the 12-packs were indeed sitting very high up, so at least that was a plausible excuse for my not having seen them before, especially since the store usually doesn't even expect its customers to notice stuff that's placed 'way up there, anyway; that "lofty" location is merely where they store extra merchandise for replenishing the lower-down shelves when the stock there starts to run low.
by QuacksO May 14, 2019

Refers to the infuriating situation of something you need's usually being at the bottom of a pile, at the back of a drawer/shelf, etc.
I have a 2--vertical-layers-deep stack of plastic totes for storing my DVD-collection, arranged in alphabetical order. It's often the case that the disc I want to watch has a title that is near the end of the alphabet, though, and so I hafta laboriously remove all da rest of da crates to access the very back/bottom box... yep, a classic case of Murphy's Law of Accessibility!
by QuacksO October 13, 2018
