Blog pests (6)

I believe the answer is:

trolls

(Other definitions for trolls that I've seen before include "Mythical Scandinavian dwarfs" , "Scandinavian goblins" , "Ugly creatures in Scandinavian mythology" , "Supernatural dwarfs or giants in Scandinavian myth" , "Supernatural creatures of Scandinavian folklore" .)

I've seen this clue in the USA Today.

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