NAH NAH NAH!
The way Horrid Henry starts every single one of his evil schemes, because he’s too lazy to think of anything else.
Nah nah nah! I’m gonna steal the teacher’s coffee and drink it during class!
Nah nah nah! I’m gonna throw a paper airplane at my enemy’s head!
Nah nah nah! I’m gonna make my math test a fire hazard.