The Grinch is a fictional character created by Dr. Seuss in his book "How the Grinch Stole Christmas!" He is a grumpy, green creature who lives in a cave on a snowy mountaintop. The Grinch hates Christmas and plans to steal it from the innocent Whos, who live in a village at the bottom of the mountain. He is a cunning, mischievous, and resourceful character who is determined to ruin Christmas for the Whos. However, he eventually finds that his plan is flawed and that the true meaning of Christmas cannot be taken away.