n.密探；告密者；线人
v.作线民；告密；使生气；苦恼
=narc.
Being a nark on the New York Police Force is a very dangerous job. 在纽约警察局当一名缉毒侦探是很危险的职业。
A nark cannot keep something in dark. 一个告密者是不会守秘密的。
He was feeling narked about being ignored. 他因为受到忽视而觉得苦恼。
