Dirty Cum Rat 

The act of cumming in a rat inside of a dumpster while shoving lizzards up your ass one by one

I just did a Dirty Cum Rat inside of a McDonald’s dumpster!

Dirty Cum Rat by hot_gilfs_and_milfs September 26, 2021

Big, fat, flapping rat trap 

The mouth someone who is saying something very stupid

Ian: I know everything
Tea-Lady: Shut your big, fat, flapping rat trap.

Big, fat, flapping rat trap by Craig Cummings October 7, 2005

Tour Rat 

A rare bird. Any person who goes to a significant portion or whole tour of a single rock band's tour run and has the appearance (due to greasy hair and generally unkempt hygene) of a drowned rat. Generally found at jam band concerts (Phish,The Dead, Widespread Panic). Regarded with a mix of wonder ("What, do you have a trust fund or something?") and disgust ("No, I'm not giving you my ticket for free.").

Dude #1 "Jeez, check out the tour rat"
Dude #2 "Wonder how many shows he's been to..."
Dude #1 "Wonder how many shows he remembers!"

Tour Rat by helen a bucket July 10, 2003

tip rat 

One who has similar characteristics to a rodent living in an area of land designated for the storage of human waste.

Ahhh take a bath you fuckin tip rat

tip rat by fatty April 7, 2004

barking rat 

Same as rat dog; a small, usually noisy dog typically weighing less than 10 to 15 pounds. Often capitalized Barking Rat.

Britney: "Oh, how cute! A Mexican Barking Rat!"
Rachel: "No, it's a Chihuahua"
Britney: "Like I said..."

barking rat by For Whom the Bell Trolls June 15, 2006

Chatt Rat 

A person who's hometown is Chattanooga, Tennessee. A Chatt Rat must be a boozehound. All Chatt Rat's must respect Chattanooga and surrounding area's. A Chatt Rat's phone number must also maintain their original 423 area code, even if they move locations. A Chatt Rat must be better than any other city in the state of Tennessee. They are champion drinkers and smokers. They must also be able to distribute even servings of a Chatt Town Beat Down.

If you aren't a Chatt Rat, get the fuck out of this bar.

Chatt Rat by PKA Boozehound Club October 20, 2010

backpack rat

Someone of the Indy culture that carries a backpack everywhere they go for various artist/writing/ipod/iphone/other silliness. You can see them frequenting coffee houses and milling about universities.

Dude... Starbucks is full of Backpack Rats.

backpack rat by Ron George November 28, 2007