Minecraft Lava Syndrome, often abbreviated as MLS, is a condition that happens when a minecrafter falls into still lava whilst carrying a shitload of items, subsequently losing them. Symptoms include anger, hatred for minecraft and unwillingness to play the game. Can last from 15 mins to up to 2 days, depending on the circumstances at the time of falling into the lava pool.
Dave: Hey John, wanna play some Minecraft?
John: Screw you Dave, I have Minecraft Lava Syndrome.
Dave: Oh, that sucks... You lost a lot of items?
John: 8 DIAMONDS AND HALF A SET OF DIAMOND TOOLS!
Dave: Oh that's harsh...