For easier definition please see Red vs. Blue episode 54 entitled "Hello My Name Is Andrew" on Red Vs. Blue .com. This episode is under season 3.
Church: Who's there?
Gary: You Are ...
Church: I are what?
Gary: You are a dirty dirty shisno hahahahaha
A. A skunk.
Q. Does a skunk defecate?
Q. And does the skunk's defecation in turn produce its own excrement?
A. Ew, no.
Q. Then there is no equivalent for shisno in your language.
You are, who?
You are a dirty dirty shisno. Ha Ha Ha.
MOM:here you go son your favourite cookies!"
KID: thanks mom, your such a shisno!"
KID 1:wow kid your such a shisno!"
KID 2:what the hell is a shisno?"
you may NEVER tell a person what a shisno is, they have to find themselves without help.