Rat fink and Weasel

Rat fink noun - A person who provides information about another's wrongdoing.

Weasel and rat fink are semantically related. in scoundrel topic. In some cases you can use "Weasel" instead a noun phrase "Rat fink", when it comes to topics like informer to police.

Weasel noun - Small carnivorous mammal with short legs and elongated body and neck.

Rat fink and weasel are semantically related. (North American) Sometimes you can use "Rat fink" instead a noun "Weasel". informal substitute