The word grumpy can be used to describe a person or an animal who is easily annoyed or angered. When it comes to reindeers, the word grumpy is often used to describe Rudolph, the most famous reindeer of all. Rudolph is known for his red nose, which lights up the night sky, and his cheerful attitude despite always being teased by the other reindeers. While Rudolph is the most well-known grumpy reindeer, there are actually many other reindeers who could also be described as grumpy. Some of these other grumpy reindeers include Donner, Blitzen, and Vixen.