Well, if we’re talking about US, I sort of prefer dia-DON’T-beat-us!!! 
Like, it’s all Greek to me? Or maybe Algebra? Or maybe I have a secret crush on Wilford Brimley???
That sounds like the best pronunciation yet!
I’m a Type 1 of 54 years and all I know and have ever heard was di-a-be-is. There is no “u” in diabetes to pronounce the word as “tus”. Webster’s shows the pronunciation with the " t" as silent and ending as “is”. Could it be a colloquialism from your part of the country? Diabetus drives me crazy.
I heard it pronounced dia-be-tus myself
I keep trying to conceive of this debate in the terms of “The Cousins’ Wars”, which compiled folkways from the English Civil War, through the American Revolution to the US Civil War. The could, of course, be stretched out to Bush vs. Gore/ Red States/ Blue States, etc. however I wonder how this structure may have affected how we say the D word…
I’ll start saying Tyrannosaurees Rex and see if anyone starts complaining
And if they do, you can just EAT them. Humans are very low carb!
whats that song? You say pajamas, and I say pajamas, you say tomato and I say tomato.