rat
/ɹæt/
A medium-sized rodent belonging to the genus Rattus.
Any of the numerous members of several rodent families (e.g. voles and mice) that resemble true rats in appearance, usually having a pointy snout, a long, bare tail, and body length greater than about 12 cm, or 5 inches.
A person who is known for betrayal; a scoundrel; a quisling.
What a rat, leaving us stranded here!
An informant or snitch.
A scab: a worker who acts against trade union policies.
A person who routinely spends time at a particular location.
He loved hockey and was a devoted rink rat.
A wad of shed hair used as part of a hairstyle.
A roll of material used to puff out the hair, which is turned over it.
Vagina.
Get your rat out.
Short for muskrat.