(usually with “on” or “out”) To betray a person or party, especially by telling their secret to an authority or an enemy; to turn someone in.

(regional) A scratch or a score. / (nautical, regional) A place in the sea with rapid currents and crags where a ship is likely to be torn apart in stormy weather.

(regional) To scratch or score. / (regional, rare, obsolete) To tear, rip, rend. / Damn, drat, blast; used in oaths.

(military, slang) A ration.

The first of the 12-year cycle of animals which appear in the Chinese zodiac related to the Chinese calendar.

simple past tense and past participle of rat

(Britain, slang) intoxicated

present participle of rat

(archaic) The blood sport of setting a dog upon rats confined in a pit to see how many he will kill in a given time.

(transitive) To tattle, squeal about (someone)