TETSNBN is the Edition That Shall Not Be Named an acronym created by a member of Dragonsfoot as a term for the banned topic of 3E (3rd Ed D&D). this term was used
frequently in the past and also currently on Dragonsfoot and is one of a list of several acronyms that users of Dragonsfoot need to know.. A Term used to refer to the 3rd edition and the 3.5 edition of the
Dungeons & Dragons game (produced) by
Wizards of the Coast, used primarily by those who prefer the earlier (TSR-produced) versions. TETSNBN is pronounced “tets bin”. See also TATSNBN. This term was coined in 2004 and has been in wide use since then.