The term 'excellent, in slang' can be expressed in five different ways: PRIMO (5 letters), PHAT (4 letters), DEF (3 letters), GNARLY (6 letters), and ALLTHAT (7 letters). PRIMO is derived from the Spanish word for 'first-rate' and is used to describe something THAT is of high quality. PHAT is an acronym for 'Pretty Hot And Tempting' and is used to describe something THAT is attractive or desirable. DEF is an abbreviation for 'DEFINITELY' and is used to emphasize the positive qualities of something. GNARLY is a surfer term THAT means 'EXTREME' and is used to describe something THAT is intense or difficult. Finally, ALLTHAT is a combination of the words 'all' and 'THAT' and is used to express admiration for something THAT is impressive.