Answer: An ogre
In the movie Shrek, the green guy referred to in the question is indeed an ogre named Shrek. Ogres are typically depicted as large, ugly, and fearsome creatures in folklore and mythology. However, in the movie, Shrek is portrayed as a lovable and relatable character, despite his physical appearance. The character of Shrek has become an iconic figure in popular culture and has spawned numerous sequels, spin-offs, and merchandise. The success of the Shrek franchise has also led to a resurgence in interest in fairy tale adaptations in Hollywood.