pretentious but insincere or empty language

His speeches seem erudite but analysis reveals them to be mere claptrap.

any artifice or expedient for winning applause or impressing the public.

noun

drivel , bombast , bunk , nonsense , fustian , grandiloquence , magniloquence , orotundity , rant , turgidity , balderdash , blather , bunkum , garbage , idiocy , piffle , poppycock , rigmarole , rubbish , tomfoolery , trash , twaddle , baloney , bull , hogwash , hokum , hooey , humbug , insincerity , malarkey , pretension