Hankey was inspired by something from Trey Parker's childhood.
From the orlandosentinel.com
Hankey believed in the price system.
From the online.wsj.com
Comedian Red Buttons played it serious for a Best Supporting Actor nod in the wartime hankey-wringer that won a fistful of hardware that year.
From the time.com
More examples
Handkerchief: a square piece of cloth used for wiping the eyes or nose or as a costume accessory
Hankey is a small town on the confluence of the Klein and Gamtoos rivers in South Africa. It is part of the Kouga Local Municipality of the Cacadu District in the Eastern Cape.