To inform on, especially in betrayal of others.
To contact or cooperate with the police for any reason.
A ball used in the sport of Quidditch.
A thief.
An informer, one who betrays his group.
A nose.
A tiny morsel.
to admit one's wrongdoing, to own up
to volunteer for something; to offer one's services
to take one or more steps forward, especially in response to a request for identification