This can be easily diagnosed by the compulsive sound that is injected into every second word or utterance by its sufferers. This sound has a distinct form "fhitton". Even though the people of Petsmo now speak a perverted dialect somewhat resembling swedish and urdu, the syndrome means that a typical sentence like "I would like to order a chicken tikka masala" would be spoken like this in Petsmo: Fhitton Can Fhitton I Fhitton have Fhitton a Fhitton chicken Fhitton tikka Fhitton masala Fhitton. (notice the pattern of injecting fhitton to separate words, a classical pjykken-syndrome sign.)