Shady Acres is a retirement home in South Park. It was first seen in Season Six episode, "The New Terrance and Phillip Movie Trailer". Then had a more prominent role in Season Seven episode, "Grey Dawn".
Looking for a place to watch the movie trailer, the boys resort to seeing it where Stan Marsh's grandfather lives. The other residents at Shady Acres have other plans with their TV causing the boys to find another place to watch it.
The elderly of Shady Acres take up arms with the help of AARP. The cause of which was when elderly drivers became hazardous to the public, killing people and destroying property. The townsfolk vote to take away all elderly persons drivers licences which angered Grandpa Marsh, he raised an army against the town for the right to keep their drivers licenses from being taken away.