Something you call someone just to be funny or if they are being annoying you just say it as a common thing or if someone is just getting on your nerves
Did you see what mason did he is such rat
Something BadBoyHalo calls his dog, and what I'm sure some of your friends call their dog
Friend: "I took my rat on a walk today"
You: "You mean your dog?"
Friend: "Yes. My rat."
A person who on average consumes 3 bottles of jack a week, does h-vac, and has persona of which you could only describe as a rat
My friend rat drank a handle of jack and missed his plane
Rat is when someone (6ix9ine) Snitchs on someone
Friend1: yo you hear what 69 did?
friend2: yeah that bitch a rat