Double Underhook Pass

The Double Underhook Pass, often referred to as the Stack Pass, is a powerful pressure-based guard pass in Brazilian Jiu-Jitsu. The passer secures deep underhooks beneath both of the opponent's legs (often gripping the belt or pants), lifts their hips off the mat, and drives forward to 'stack' the opponent onto their shoulders or upper back. This severely limits the opponent's hip movement and ability to effectively use their legs for guard retention, allowing the passer to walk their body laterally around the trapped legs to achieve a dominant position like side control. It's known for its crushing pressure and effectiveness in immobilizing the opponent.