The Troll is an unnamed antagonist of the Norwegian fairy tale "Boots Who Ate a Match With the Troll", as is common in folklore, the troll was not very intelligent and was outwitted by the much smarter protagonist.
A farmer sent his sons to cut wood in a forest he owned, to pay off debts. A troll threatened them as they came, one by one; the two older ones allowed themselves to be chased off, but the youngest asked for food. When the troll threatened him, the boy pulled out some cheese, claiming it was a stone, and squeezed it until whey came out. When he threatened to deal with the troll as he had with the "stone", the troll offered to help him with the wood-cutting.
The troll suggested that he come home with him. Then he went to build up the fire and sent the boy for water. The boy realized he could not carry the huge buckets, so he declared they were too small, and he could just fetch the spring. The troll exchanged chores with him.
When the porridge was made, they had an eating match, but the boy put more into his scrip than into his stomach, and when it was full, he cut a hole in it. The troll said he could eat no more. The boy suggested that he cut a hole in his stomach, which would let him eat as much as he liked, and it did not hurt much.
The troll did so, and died, and the boy took his gold and silver and paid off the family debt.