<sigh> How are our young people ever going to survive with today's education?
-itus is a suffix to indicate "condition of..." then add the root word stud and you have your definition. Gosh, Kim I thought you were a journalism major!
Here's another example of that logic:
Monkey is a word meaning a certain type of primate.
-pwned is a word meaning to get owned.
Therefore, Monkeypwned is a word meaning to get pwned by a monkey.