This is a disease that usually occurs at the age of 15 or 16, especially in the UK during GCSEs. There is no known cure but it usually dies down a bit after that period of time.
However, there are some people who are born with this disease and live their whole life suffering from it. It is, unfortunately, hereditary.
Symptoms include: "FML", more swearing than usual, becoming maniacally depressed at writing with a blue biro, banging head on table, banging head on wall, banging head on any available surface, napping in the afternoon, napping in class, staying up very late in the evenings.
Teen 2: "Wow, he's got a bad case of CCD"
Person 1: *banging head against wall* FML. FML. FML.
Person 2: What's wrong?
Person 1: LEAVE ME ALONE!
Person 3: I'd leave her alone, she has CCD
Person 2: *comprehension dawning* oooh
(its a catholic thing) or "Religious Education"..young people of the catholic church learn about the bible and the catholic church and stuff..like sunday school..it can be on sundays or wednesdays
oh i hav to go to CCD..
Joe- Gunna go waste my time and watch my peers break windows...
Bob- So you're going to CCD...
Dude that camera is shit, get with the times, this is my new canon XL2 with 3CCD technology.