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Ratting

noun, verb

Noun

1
The blood sport of setting a dog upon rats confined in a pit to see how many he will kill in a given time. archaic, uncountable, usually
"Henry Mayhew, the nineteenth-century chronicler of London's underworld, described the frenzied activity of one ratting contest. A terrier — the best of ratting dogs — was placed into a pit with 50 rats."
2
to furnish incriminating evidence to an officer of the law (usually in return for favors) wordnet
3
A vocation involving the pest control of rats, typically using a working terrier. uncountable, usually
4
Desertion of one's principles. uncountable, usually
5
Working as a scab, against trade union policies. uncountable, usually

Verb

1
present participle and gerund of rat form-of, gerund, participle, present
"Don't go ratting to the police about what happened."

Unscramble this word: ratting