The term "PASS" stands for "Pull, Aim, Squeeze, and Sweep." It is a method used for operating a fire extinguisher effectively in case of a fire emergency. The first step, Pull, involves removing the safety pin from the extinguisher. Next, Aim means directing the nozzle at the base of the fire. The third step, Squeeze, requires pressing the handle to release the extinguishing agent. Finally, Sweep involves moving the nozzle side to side at the base of the fire until it is completely out. Following these steps can help ensure safety and effectiveness in fire situations.