Word used by the Red Feathers American Indian tribe whose chief Red Cloud threatens to declare war on the United States unless all native lands are returned.
When Maxwell Smart infiltrates the tribe he unwittingly takes the place of the chief's daughter White Cloud's "tuppawassi".
Communicating by a radio hidden in a tomahawk, he asks Agent 99 to look up "tuppawassi" in the book of Indian lore she has with her.
When she tells him that it means betrothed he asks her to look up "betrothed".
[Episode #6: "Washington 4, Indians 3".]