grand poo bah
there's larry again, trying to tell everyone what to do and swanning around like he's the grand poo bah
a grand poo bah is any [overbearing] and [pompous] [authority], often claiming numerous [title]s, [role]s or [distinction]s and frequently [overplaying their hand]
"there's larry again, trying to tell everyone what to do and swanning around like he's the grand poo bah" What is the definition of "grand poo bah"?