I would have done so at first but I couldn't find an accurte way to write it out phonetically. Its a bit like Yaris, as in a Toyota Yaris, but with a soft A and R, and no i-sound.
Closest I can think of is "yar's". yahrus? Thats both "my" and the word itself, by the way.
Edit: its similar to walrus! but again not as much of an 'uh'