nark
noun
a stool pigeon or informer.
A verb form that is used in progressive verb constructions and may also function as a modifier or a gerund.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It means royally narking off Mrs Fiver by ignoring her and watching football yet again, just hours after the end of the play-off final and everything.
From The Guardian ● May 21, 2010