"your such a freakin' hypochondriac dude."
A good example is the guy in the movie Bandits. He listens to tapes of the definitions of illnesses to calm himself down.
"Its dirt, dude. You're sucha hypochondriac!"
Person B: Simmer down, Hypochondriac, it's just the pollen in the air.
Person A: There's pollen in the air!? I'm gonna DIEEE!
Person B: *Facepalm*