To try to nail Jell-O to the wall means to attempt a completely impossible, frustrating, or futile task. It is most often used to describe the frustrating process of trying to pin down an evasive person, secure a firm agreement, or get a straight answer.
While some modern internet definitions attempt to assign highly complex meanings to the phrase, such as “imposing order on a chaotic system”, in everyday conversation, the idiom is usually much simpler. It is just a highly visual way to describe an effort that is doomed to fail because of its futility.
The Origin: Teddy Roosevelt and “Jelly”
While Americans today almost exclusively use the phrase “nail Jell-O to the wall,” this is actually a modernized, brand-name variation of a much older political idiom: nail jelly to the wall.
The original phrase was famously coined by U.S. President Theodore Roosevelt. During the Panama Revolution in the early 1900s, Roosevelt was deeply frustrated by his inability to secure a reliable, lasting treaty with the leaders of Colombia. He vented his frustration to his cabinet using a brilliantly vivid metaphor:
“You can no more make an agreement with those leaders of Columbia than you can nail currant jelly to the wall. And the failure is not due to the nail. It’s due to the currant jelly.”
The phrase caught on immediately in the press as “nail jelly to the wall” and remained popular for decades. However, as the Jell-O brand grew into an absolute staple of American culture throughout the 20th century, the phrasing gradually began to shift. By the early 1970s, the variation “nail Jell-O to the wall” began appearing in print, eventually eclipsing the original “jelly” version in the United States.
The Metaphor: Why Jell-O is an Improvement
While we often assume modernized, brand-name idioms are simply corruptions of the original, the shift from “jelly” to “Jell-O” is a rare instance where the imagery was actually improved.
When Roosevelt coined the phrase, he explicitly noted the physics of the metaphor: “The failure is not due to the nail. It’s due to the currant jelly.” However, actual fruit jelly is essentially a fluid paste. You cannot even pick up a piece of it to begin the task, you would simply be smearing it against the wall.
Jell-O, on the other hand, is deceptively solid. A molded block of gelatin has physical structure. If you tried to nail it to a wall, it might actually seem secure for a split second before the structure fails and it slowly tears, shifts, and slides to the floor.
Whether modern speakers consciously realize it or not, the Jell-O metaphor perfectly captures the true frustration of the idiom, the false hope of success. It perfectly describes a situation where you think you have finally pinned down an agreement or a person, only to watch it inevitably slip away.
Television and Movie Citations
Because the visual imagery of trying to hammer a gelatin dessert into drywall is so inherently funny, screenwriters use to use this idiom to describe wildly frustrating situations or elusive people.
- The Slippery Evidence: In the military comedy Sgt. Bilko (1996), the phrase is used to describe an investigation where the facts keep disappearing. This scene is also a comedic example of a character thinking way too much about the proper methapor to use: “All my training tells me he’s hiding something. Every time we’re about to find something, it dissolves. It’s like trying to nail Jell-O to the wall.” / “No. It’s like watching a magician. He’s got you watching his left hand, and his right hand keeps pullin’ rabbits!”
- The Evasive Person: In the drama The O.C. (2007), the idiom captures the frustration of dealing with an uncooperative, flighty character: “Let’s get on with the wedding.” / “I’m sorry, can… can I have a moment?” / “Oh, that woman is like nailing Jell-O to the wall.”