The Exploding Chewing Gum is one of the prank items Frank sells at the Palace of Pranks in the episode "Pranks a Lot." It causes the head of anyone who chews it to explode, with only the bone left. It costs $9.95.
Exploding gum appears to resemble regular gum. The box for it is light aquamarine in color and has the words "EXPLODING GUM" written in red print with a yellow explosion banner centered around a red border.
Role in series
SpongeBob and Patrick had gone to the Palace of Pranks to find some gags to play on people. Exploding gum is first seen when Frank shows SpongeBob and Patrick different kinds of gag toys. Frank manages to trick Patrick into chewing a piece of the gum, which literally blows his head up, only for him to recover within the following two seconds.
The exploding gum is a reference to the famous shocking gum where the victim gets shocked when attempting to get a piece of gum.
It could also be a reference to the infamous dirt gum, where the gum looks normal but tastes like dirt.