I wasn't Vernon, no.
Although sensing the possible finger of ridicule I went ahead with a Wiki search of rising intonation.
It appears from this that I might have misinterpreted the meaning from the OP (or possibly not).
I refer to the way Uni students, especially middle & upper middle class students & pseudo posh students tend towards accentuating the last word with higher pitch & elongation of the word.
Hard to describe my meaning without speaking it.
Intonation as far as I can deduce.
My sister, the only member of my immediate family to have gone to Uni, does this now, having never done it prior to Uni.
I believe she deliberately changed her accent & the way in which she delivers a sentence in order to fit in with her Cheshire set friends.
Or maybe you might just be in disbelief that it could irk someone.
Annoys me in the way that the constant use of innit, arksed (asked) & yeah does.