upper crust upper classman • upper-cruster · · · Info · Definitions · Synonyms · Characters · · upper crust · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) the class occupying the highest position in the social hierarchy. Synonyms: upper class, upper crust. · · Noun Definition 1 Synonyms · · · upper class · · Synonym 1 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075