Purposeful nippling is going after the nipples with a purpose like are you gonna bite them? You want to lick them? Or can I just get a nibble. Simply put, it’s going at the nipples with a purpose. As opposed to accidental nippling where somebody’s nipples end up in your face and you’re overwhelmed by the nipple and compelled to put it in your mouth and do something with it. See accidental nippling for this.
The gender-neutral term for a niece or nephew (by analogy with sibling).
Nephlings are the delightful creatures you can adore and play with and who look up to you, but whose diapers you don't have to change and whose tantrums are not your problem. The warm feeling you get from seeing your nephlings is unconscious gratification that your genes are being passed on (indirectly) to the next generation, without any effort of your own.
"I'm going to give you a hard nippling tonight, babe."
"If you don't shut up I'm going to give you a nippling!"
*Nuzzles your cheek and gives you a nippling* "UwU."