One who will make false accusations about people and be unable to back them up.
They will convince themselves that the accusations are real, and will never admit that it was made up.
Peter Paranoia claimed that Joe was stealing all of his tools from his shed, then Peter Paranoia accused somebody of urinating in his chocolate biscuits and lemonade.
guy 1: whats wrong man? you seem to be acting like your about to die
guy 2: i have a headache that has been going for weeks and when i looked on webmd i apparently have a brain tumor guy 1: you just have a case of webmd paranoia