[retsibsi]

I think "pretty much everyone" is an exaggeration. Google's pronunciations (British and US) are both the 'anus' version -- though the British one has a secondary stress on the first syllable, rather than the schwa of the US version.

Growing up in Australia, the British 'you-ray-nəs' (i.e. not quite 'your anus', but only because of the first vowel sound) is the pronunciation I was familiar with. Lately I've heard 'you-rə-nəs' fairly often, but not exclusively.