Instead of laughing, a "sniss" is a slightly stronger than normal exhale through your nose followed by a grin after seeing or hearing something slightly funny
by Danny gp December 19, 2021
Verb. The act of peeing as a result of sneezing. Most common during pregnancy. The word is an amalgamation of "sneeze" and "piss."
Damn it all! I snissed myself again!
by SirBaronAaron February 04, 2016
An involuntary sneeze erupting just as one is to commence pissing thus producing a painful expansion of the urethra followed by a two-three days of dick hurt.
by Mennix August 04, 2011
When ben pooped himself in class, the teacher was so snissed that she gave him his second ten day suspension.
by Wolf Prime August 05, 2013