Non-gender specific form of neice or nephew. As 'sibling' is to brother and sister. And 'spouse' is to husband and wife - 'Neibling' is to neice or nephew.
"My latest neibling was borntoday. Welcome to the world Darcy."
" How many neiblings have you got?"
(Verb) The act of trying desperately to be successful at FPS such as Halo or Call Of Duty and kill other players only to be killed repeatedly in a hilarious fashion. This also includes being spawn raped, quick scoped multiple times, and having general ineptitude for FPS. Forms include: Noun-Newb Off; Verb- Newbing Off (Present), Newbed Off (Past).
John: Wow dude you really went 3 and 22 in Black Ops?
Dave: Yea I thought I was going to be good.
John: Sounds like you were doing some major newbing off.