You just got "pwned" if you got called a "newb" or "noob" and it sometimes is used as just a common name for people even if you are the most experienced at something, people still tell you that you are a "newb" or "noob"
Hard to pronounce if you iotize the 'u'
Here's what Wiktionary has for "newbie":
IPA(key): /ˈnjuːbi/, /ˈnuːbi/ Rhymes: -uːbi
What's the evidence that we want only "nyoob" for this word??