Bertie Wooster’s vocabulary is very esoteric. There’s a partial list of expressions here.
Bertie (narrating): It’s not often that my man Jeeves runs into a set of circs. he can’t handle. He’s absolutely topping at dealing with pesky engagements and overbearing aunts.
But when my cousin’s fiancée began smashing dinner-tables in one go, I confess a touch of doubt crept into the Wooster melon!
Alucard (reading): “But, oh dear! I seem to have begun in the middle of things again…”
Integra: Our narrator is a bit of a twit, I see.