used when defining someone as new to Youtube or as an insult for them doing something nooby
"you dont answer my question by posting another comment, or i won't know for weeks. you need to press the reply button you bloody youtube noob"
1. a "cool" kid who thinks its awesome to have a name like HotForRealz429
2. a person with a youtube account who only critizes other's videos
1. Eww on my User page LoveMeBaby001 says he wants to make out with me, what a youtube noob
2. That youtube noob commented how my video is "immature and crap-like"