Chumsticks is the main chum made by Plankton and one of the many chum products provided by the Chum Bucket. It has two forms: as a hot dog shape, or a square. They are known for their disgusting taste and making people vomit. The ingredients to the Chumstick are revealed in the episode "Spongicus." Patrick Star is the only person in Bikini Bottom who can actually eat raw chum without even throwing up, getting sick or even die. Sandy Cheeks also had to eat as much raw chum as she could, but she was horribly mutated by it.
In the episode "Chum Bucket Supreme," Plankton fed one to SpongeBob which caused the disguise SpongeBob and Mr. Krabs was hiding in to explode. SpongeBob was then seen wiping his tongue with a sponge obviously disliking the taste.