What is Sniss?
1.
the unintented release of urine while sneezing
I need to roll and change my drawers, I just snissed myself
2.
when you sneeze so hard you piss your pants a little
"achoo!
...
awww man, hold on, i just snissed myself."
See 
3.
"SNISS" - aka "PISS".
Scenario 1: Simon is snissing up the wall. Scenario 2: Simon is very snissed off.
4.
sniss
5.
what
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Random Words:
1. 
means "totally not good"- used in the Super Milk Chan Show(best show right next to Magical Play)
I'm about five seconds ..