adjective: (African-American Vernacular, slang) excellent; very good
noun: Abbreviation of deficit. [Deficiency in amount or quality; a falling short; lack.]
noun: Abbreviation of definition. [(semantics, lexicography) A statement of the meaning of a word or word group or a sign or symbol (dictionary definitions).]
adverb: Abbreviation of definitely. [Without question and beyond doubt.]
noun: (automotive) Abbreviation of diesel exhaust fluid. [(automotive) A liquid used to reduce controlled emissions from the exhaust of diesel engines]
noun: (role-playing games) Initialism of defence point.
