Last updated: June 2, 2026
Quick Definition
The knee slide pass is a guard pass in Brazilian jiu-jitsu where the top grappler drives one knee diagonally across the opponent’s thigh, pins that leg to the mat, and slides through into side control.
What is the knee slide pass?
The knee slide pass is one of the most common ways to get past an opponent’s guard in BJJ. Guard is the position a grappler plays from their back, using their legs to control and stop the person on top from advancing. To pass the guard is to clear those legs and settle into a dominant pin. The knee slide does that by picking a side, dropping the near knee across the opponent’s trapped leg, and working through to a controlling position on top, usually side control or the kesa gatame (a side pin where the top player traps the head and an arm).
It belongs to a family of pressure passes, meaning the passer advances by staying heavy and tight rather than moving around the legs at speed. A white belt usually meets it within the first months of training, and black belts never abandon it. Lucas Lepri and Romulo Barral built large parts of their competition careers on it, and BJJ Fanatics calls it one of the most popular passes in the history of the sport. It works in the gi, in no-gi, and in MMA.
The name describes the action. The passer’s shin and knee cut through the gap between the opponent’s legs instead of going around them, which is why some coaches also say slice or cut. Most often it is used against the half guard, where one of the bottom player’s legs is trapped, and against open guards, where the legs are not locked together.
How the knee slide works
Picture the top player with one knee driving down across the opponent’s thigh while the other foot stays posted wide on the mat for balance. The shin is the wedge that splits the legs apart. As the knee presses toward the floor, it pins the bottom leg so the opponent cannot follow the hips and rebuild their guard. Once that leg is pinned, the passer slides their own hips through and lands in side control.
One detail separates a clean pass from a scramble: the underhook on the far side. The top player threads an arm under the opponent’s armpit to control the upper body and stop them from turning in. Without it, the bottom player can come up and take the back. Lucas Lepri’s well-known version, broken down by Bernardo Faria for BJJ Fanatics, leans on a strong collar grip and that far-side control to flatten the opponent before the pass even finishes.
Head and angle matter too. Good passers drive the head forward toward the mat past the opponent’s shoulder and cut on a diagonal rather than straight ahead, which keeps their weight stacked and hard to push away. If you are watching a match and see someone drop a knee across the thigh while digging for an underhook and crawling their head forward, that is the knee slide in motion.
Knee slide, knee cut, or knee slice?
These are three names for the same pass. Graciemag has pointed out that grapplers slide, cut, or slice with the knee and still mean one technique: getting through the legs with the knee rather than around them. In most American gyms, the move is called the knee cut. Elsewhere, people say knee slide or knee slice. The label often comes down to who taught it and where, not to any real difference in mechanics, so a search for any of the three leads to the same position.
How the knee slide differs from other guard passes
Guard passing has many styles, and the knee slide is the pressure-and-pin option. Comparing it to other common passes makes the distinction clear.
| Pass | How it clears the legs | Best known for |
|---|---|---|
| Knee slide | Drives the knee through the legs and pins with pressure | High-percentage staple from half guard |
| Toreando | Pushes the legs aside and moves around them at speed | Fast, gi-friendly bullfighter pass |
| Leg drag | Drags one leg across the body to clear the hips | Controlling no-gi and modern grappling |
| Stack / over-under | Folds the opponent up and walks around the top | Heavy pressure on flexible guards |
The thread that sets the knee slide apart is the path. It goes through the opponent’s legs with the knee as the tool, while passes like the toreando clear the legs by going around them, and the leg drag pulls a leg across the body. That is why the knee slide is often the first pass taught: the movement is short, and the same idea carries from white belt to black belt.
What stops a knee slide
The pass is hard to shut down once it is moving, but it is far from automatic. The single biggest battle is the far-side underhook. If the bottom player wins that underhook first, the pass often stalls into a dogfight, a scrambling position where both players fight for the same arm, and the top game can be reversed. BJJ World makes the same point: defending the knee slide starts with the grip fight for that underhook.
Two other tools come up constantly in commentary. A knee shield, where the bottom player wedges a shin across the passer’s hip or torso, blocks the pass before it starts. Framing with the arms against the neck and shoulder creates space to escape. There is also the quarter guard, where the bottom player traps the passer’s foot to stall the slide. Coaches such as Jon Thomas and Stephan Kesting at Grapplearts teach defenses for the early, middle, and late stages of the pass, since the window to stop it changes as the knee travels. Knowing the names of these answers makes a live match much easier to follow.
Frequently Asked Questions
Is the knee slide the same as the knee cut?
Yes. All three labels point to one guard pass, and the only thing that varies is which word a given coach or region happens to use.
Is the knee slide pass good for beginners?
It is one of the first passes most white belts learn. The motion is simple, and Evolve MMA describes it as one of the highest-percentage passes a beginner can pick up and keep using as they advance.
Does the knee slide work in no-gi and MMA?
Yes. It is a staple in no-gi and MMA as much as in the gi. Without a gi to grip, the passer leans more on body control and head position, but the wedge-and-pin idea holds.
Where does the knee slide end up?
It usually finishes in side control or kesa gatame, both top pins that set up submissions and further advances.
Does the knee slide hurt?
The pressure can feel uncomfortable for the bottom player, but it is a safe and legal technique when done properly.
Sources
- Evolve MMA. “How To Perform The Knee Slice/Cut Pass In BJJ.” Accessed June 2026.
- BJJ Fanatics. “Is the Knee Slide the Most Important Pass?” and “The Knee Cut Pass.” Accessed June 2026.
- NAGA Fighter. “What is the Knee Slice Pass?” Accessed June 2026.
- Grapplearts. “3 Great Knee Cut Counters” and “5 Techniques for Knee Cut Guard Pass Defense.” Accessed June 2026.
- BJJ World. “Knee Cut Pass Defense: Exploring Several Different Options.” Accessed June 2026.
- Graciemag. “Knee slice, slide or cut? Views on the popular guard pass.” Accessed June 2026.
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