- “Remember how we always thought there wasn't a way to kill a toon? Well, Doom found the way: turpentine, acetone, benzene; he calls it the Dip!”
- ―Lt. Santino.
According to Lieutenant Santino, it is a mixture of turpentine, acetone and benzene; the former two being paint solvents, and the latter being a natural constituent of crude oil and one of the most basic petrochemicals. While it is relatively harmless to humans (as Eddie Valiant was seen running through an ankle-deep pool of it), any toon that comes in contact with it will melt slowly and painfully, and is apparently the only surefire way to kill a toon.
As a well-deserved poetic justice, Judge Doom ends up being melted himself near the end of the film, after revealing himself to be actually a toon. He also invented a vehicle machine called "The Dipmobile," which would have dissolved all of Toontown into oblivion. Fortunately, it was destroyed by an oncoming toon bullet train.
- The Dip is the toon equivalent of the human death penalty.
- "Thinner" from the Epic Mickey series strongly resembles the Dip.
Characters: Roger Rabbit | Jessica Rabbit | Eddie Valiant | Dolores | Judge Doom | Toon Patrol | Smarty | Greasy | Wheezy | Psycho | Stupid | Baby Herman | Benny the Cab | R.K. Maroon | Marvin Acme | Lt. Santino | Bongo the Gorilla | Toon Bullets | Singing Sword | Toons | Lena Hyena | Toon Shoe | Lenny the Cab | C.B. Maroon | Angelo | Baby Herman's Mother | Rick Flint
Disney Parks: Roger Rabbit's Car Toon Spin