Phlegmin served as a kitchen assistant to Porcellus, the chef of Jabba the Hutt. He accepted payment from J'Quille to introduce a gradual poison into the freckled frogs that Jabba consumed. It's possible Phlegmin's actions were also influenced by Jabba's decision to feed his brother to a rancor because he did not like a particular sauce. Leveraging this knowledge, he secretly used it to extort money from J'Quille. Dannik Jerriko ultimately murdered him.
Gartogg subsequently paraded his embalmed corpse around.