1) Ninky nonk is a character from the greatest
fucking show of all time (In the night garden).
2) It's a
funny way to insult someone without the use of vulgar language
1) Ninky Nonk is like the best character ever
2)
Lad 1: You sir are a Ninky Nonk
Lad 2: Well... um... your mum gay *Runs away crying realising he's a fucking failure who got destroyed by an innocent insult*