A stupid single line of facial hair between the bottom of the nose and the top lip. So thin as to be completely pointless. Makes wearer look very shifty and/or a pervert.
"When will you shave off that bloody Rat's Moustache?"
A miserable little dog, usually a terrier. The owner thinks that the sun shines out of their shit rat's arse. Given the opportunity, a shit rat will piss all over your house, and/or yap incessantly at nothing at all.
My girlfriend's Scotty is a shit rat. She pisses all over the floor right after going for a walk.
A word used to be spiteful and suggests not caring.
'I don't give a Rats Arse about you'
People who have no lives so they spend all day and every day at the mall creeping on people.
We want to be Mall Rats today.
Fag1: Dude, I am feeling in a creepy mood, I think I am going to act like a Mall Rat today.
Fag 2: Good idea! I am feeling creepy too!
A term used to describe a pesky bird, especially common in the New York City area where there are tons of pigeons.
Friend 1: Hey look, it's a pigeon!
Friend 2: Yuck, that flying rat just shit all over me!
A Nole rat is a FSU student who pretends to be an Seminole fan, then decides to say hello or wave to a Gator fan.
*John waves to a UF fan*
John you fucking Nole-rat!
A slutty girl that goes from room to room in the shacks (military barracks).
Jim is screwing a shack rat in his room. I had her last tuesday.