ratting

(noun) to furnish incriminating evidence to an officer of the law (usually in return for favors). Synonyms: informing.

(verb) desert one's party or group of friends, for example, for one's personal advantage. Synonyms: rat.

(verb) employ scabs or strike breakers in. Synonyms: rat.

(verb) take the place of work of someone on strike. Synonyms: fink, scab, rat, blackleg.

(verb) give (hair) the appearance of being fuller by using a rat. Synonyms: rat.

(verb) catch rats, especially with dogs. Synonyms: rat.

(verb) give away information about somebody. Synonyms: denounce, tell on, betray, give away, rat, grass, shit, shop, snitch, stag. Example: "He told on his classmate who had cheated on the exam."