The idea came form south park from the word "niblet" (WITH A T)!!! to descride a small fluffy bird. Nibling means small, ginger haired (possibly annoying person) When someone does something stupid, ect...(can be any ONE of those) it is NOT an offence, mearly a describing word and can be used in any context angry-NIBLING! Unamused-Niiiiibling and so on...
Summary of meanings :
1. small or smallish
2. ginger haired
4. doing something stupid
5. acting stupid
Also a good nick name for someone with those traits. :D
Person A: slips and falls in mud.
Person B: Niiibling!
Person A: singing annoying song
Person B: Nibling! stop it.