Nark it! I hear someone coming!.
He narks in my ear all day, moaning about his problems.
It’s a—well, it’s a copper’s nark, as you might say. What else would you call it? A sort of informer.
It really narks me when people smoke in restaurants.
“If you narc on me, I’ll rip your arms off”, said Tim to his little brother, as he passed him a cigarette.