You have to finish the comic for the guy.
On Big Nate's island
bubble gum
all you have to do to get a pack of gum is: on Big Nate Island you have to collect all of the big nate comic book pieces.
On Big Nate island, you have to go into the Komix Shop, and talk to the guy, then find all of the Big Nate comic pieces, assemble them, and give them to him. Then he'll give you gum. *Various kinds of "effects" using gum are also available in the Store, but do not have anything to do with Big Nate Island.
you need to finish the comic give it to the guy an he will give you gum
In big nate island, find all the missing comic pieces and then give it to the guy who wants it.
Chew the bubble gum
He is in big nate
You go to your bag and press "use."
If I remember correctly, you blow bubble gum in the school.
the answer is simple CHEW BUBBLE GUM
all you have to do is use the gum you have and you will automatically get detention by one of the teachers.