plural of Rowett nude rat

An outbred rat used in medical research, white with a black or brown hood.

plural of Long-Evans rat

Oryzomys couesi, a semiaquatic rodent in the family Cricetidae occurring from southernmost Texas through Mexico and Central America into northwestern Colombia.

plural of Coues' rice rat

(simile, informal) Soaked to the point of being highly unattractive; bedraggled.

(simile, slang, vulgar) Thoroughly crazy.

plural of rat-tat-tat

Third-person singular simple present indicative form of give a rat's arse

simple past tense of give a rat's arse