How to pronounce “thumbed” in English

And I kind of thumbed my nose at this thing in the past.

There's my well-thumbed copy.

And when I thumbed through the book, I noticed he actually says stuff.

And then if you look at page 168-- I just thumbed through there-- we were singing about cockles and mussels, and we got all kinds of cockles and mussels

And what is most striking is the difference between the hand morphology here, with the short, long-thumbed hand of a human, and the long, curved hand of an ape.