The term 'excellent, in modern slang' can be expressed in three different ways: PHAT (4 letters), DOPE (4 letters), and DEF (3 letters). PHAT is an acronym for 'Pretty Hot And Tempting', and is used to describe something that is attractive or desirable. DOPE is a slang term meaning 'very good' or 'COOL'. Finally, DEF is short for 'DEFINITELY', and is used to emphasize the quality of something. All three terms are used to express approval or admiration for something.