A seemingly never-ending virus usually contracted in Las Vegas from a Charlestown sickling
DUNNY: Man, I was dunnygaming last night and I don't feel so good today. I thought that's what it was anyway...
SASSTO: Well, what was it?
DUNNY: I caught the Sistoitis.
SASSTO: Oh man! Sorry!
FLEER FLAWN: Yitadee!