- “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's a mixture of turpentine, acetone, and benzene, the former two being paint solvents, and the latter a natural constituent of crude oil, and one of the most basic humans petrochemicals. While it is relatively harmless to humans (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 (although Eddie gets most of The Toon Patrol members to laugh themselves to death).
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 invented a vehicle machine, called "The Dipmobile" which would've dissolved all of toontown into oblivion. Fortunately, it was destroyed by an oncoming toon 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