Home › Words › T › theorycraftertheorycraftertheorycrafter means one who theorycrafts.Among words judged in Lexicurio's Arena, theorycrafter ranks #31,249 of 42,749 for Qualifying.EtymologyFrom theorycraft + -er.nounOne who theorycrafts.Definitions & examples from Wiktionary (CC BY-SA 3.0).