Rat
1. Short for "Hood Rat" which is a girl who has slept with several guys from her neighborhood

2. A furry little beady eyed rodent that carrys diseases and consumes shit to sustain itself. It has no purpose to most and should immediately be shot or lit on fire if spotted

3.) A staple of Indian cuisine

4.) A person who tells on someone who has commited a crime. See Narc
Example:

1.) Shonda slept with her neighbors Mike, Kyle, Ronny, Jason, Renzo and Lisa .. She's such a rat.

2.)

Guy 1: Dood! Check out that big ass rat sitting on the fence!

Guy 2: Yeah, we should totally shoot it!

Guy 1: Hell yeah! *cocks guns*

3.) This curry chicken is delicious! I never knew rat could taste so good!

4.) Guy 1: Johnny told the shrieff that Bob was selling crack now bob is locked up.

Guy 2: Johnny is such a rat.. Lets exterminate him like one..

Guy 1: Hell yeah! *cocks gun*