I can't tell for sure but he might mean the o and O with the dots over them look like round bunny bodies with lil ears???
what's it called? or how's it sound different from a regular plain o without the dots? I know Omega is the last letter in Greek letters....
It's not really right but the pronounciation that comes pretty close is the letter "i" in the word "sir". It should be a bit more "open" though. heh.. Not easy to explain as I'm totally gone when it comes to phonetics.