The term 'first-rate, slangily' can be expressed in four different ways. The first is 'PHAT', which is an acronym for 'Pretty Hot And Tempting'. This phrase is often used to describe something that is attractive or desirable. The second is 'PRIMO', which is a slang term meaning 'EXCELLENT' or 'top-notch'. The third is 'ACES', which is a slang term meaning 'the best'. Finally, the fourth is 'DEF', which is an acronym for 'DEFINITELY'. All of these terms are used to express the idea of something being of the highest quality.