who played cousin eddie in christmas vacation

That would be Randy Quaid! He is a well-known actor who has appeared in many films and television shows. He has received a number of accolades, including an Emmy Award and a Golden Globe nomination. His portrayal of Cousin Eddie in Christmas Vacation has become a classic comedic role, and he is known for his unique brand of humor. He is also known for his roles in other movies such as The Last Detail, The Long Riders, Independence Day, and many more.