The restaurant owned by Plankton, the main antagonist of Spongebob Squarepants. Plankton is always at Mr. Krabs, the owner of his main rival restaurant the Krusty Krab's, throat, trying to steal Mr. Krabs's secret formula that allows him to make such delicious burgers.
The Chum Bucket is a restaurant that Plankton owns. Nobody goes there because of poor quality and the food is so bad. His computer wife Karen, works there. Sometimes, it is spelled Chumbucket.