What is a Ghillie suit? The original word, Ghillie, comes from a Scottish term describing a special sort of game warden. These game wardens had the task of protecting their Lord's game from poachers. A Ghillie would lie in the grass, holding very still, and wait for deer to amble by unaware of their peril. The Ghillie would leap out of hiding and grab the deer with their bare hands!