- aff. a suffix occurring in words that denote an inflammation or disease affecting a given part of the body (appendicitis; bronchitis; phlebitis); also forming nouns, often nonce words, that denote an obsessive state of mind or tendency facetiously compared to a disease (electionitis; telephonitis)•Etymology: < NL, L -itis < Gk, fem. of -itēs -ite
From formal English to slang. 2014.