Jeff is an oversized Planarian worm from This Time It's Virtual.
Traits[]
When Sam and Max free the player from underneath a dumpster, Jeff is first seen as a five-headed monster attacking the city. Using a series of distractions, Sam and Max turn Jeff's attention away from the player as they target each of his five heads with a rocket launcher. Upon defeat, Jeff suddenly shrinks down to size.
Later on, Jeff appears in the Splash Fest/Monster Whisperer part of the Freelance Police Training Academy (the rundown Aquabear theme park) where the player learns to tame him.