rat

How to sign: any of various long-tailed rodents similar to but larger than a mouse

Categories: gnawer, gnawing animal, rodent

Within this category: bandicoot rat, black rat, brown rat, jerboa rat, pocket rat, rice rat

rat

How to sign: a person who is deemed to be despicable or contemptible
"only a rotter would do that"; "kill the rat"; "throw the bum out"; "you cowardly little pukes!"; "the British call a contemptible person a `git'";

Similiar / Same: rotter, dirty dog, skunk, stinker, stinkpot, bum, puke, lowlife, scum bag, so-and-so, git, crumb

Categories: disagreeable person, unpleasant person

rat

How to sign: someone who works (or provides workers) during a strike

Similiar / Same: scab, strikebreaker, blackleg

Categories: worker

rat

How to sign: one who reveals confidential information in return for money

Similiar / Same: informer, betrayer, squealer, blabber

Categories: informant, source

Within this category: fink, nark, supergrass