A chewing gum bug is a practical joke gag used to play tricks on people, usually adults.
The trick works when the prankster tricks the victim into pulling out the last stick of gum.
A small rubber bug (folded back to fit in the pack) springs out and smacks the victim on the finger they used to hold the fake stick of chewing gum.
The "shocking gum" variant delivers a mild electric shock to the victim.
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