Laser Pants are pants made by Sandy. It just appears in the episode: Spy Buddies. When SpongeBob and Patrick want to become spies, they go to Sandy to get some spy gadgets. Sandy then shows them lots of stuff including the Laser Pants. SpongeBob and Patrick later use them to make a hole at the top of the Chum Bucket.If you had to go to the bathroom that would trigger the laser pants to shoot several lasers.
SpongeBob: Hey, Sandy!
Sandy: Hey, SpongeBob, Patrick. What ya'll doing?
SpongeBob: Do you know anything about spying, Sandy?
Sandy: Well, I know you need a lot of crazy gadgets like jet-packs, laser-equipped Bermuda shorts with walkie-talkies.
Man: 10-4, good buddy. (static)