A race of Asiatic peoples most common to southeast Asia, though they sometimes range as far as Tibet and Malaysia. They are small both in stature and in population -- few of them are taller than five feet, and there are believed to be fewer than half a million worldwide.
It is said that the tcho-tcho aren't even fully human -- old myths have it that they were created by malign gods who interbred a race of evil dwarves called the Miri Nigi with the human worshipers of a god called Chaugnar Faugn. It is also said that the tcho-tcho are just visitors to our world -- they claim that their true home is at a place called the Plateau of Leng.
The tcho-tcho are widely hated by their neighbors, primarily because the tribe enthusiastically practices cannibalism -- one of the more gruesome tcho-tcho delicacies is called bak bon dzshow -- roughly translated: human ganglia paste. The tcho-tcho customarily file their teeth into points and raid neighboring tribes for food. It is also believed that the tcho-tcho practice black magic, and in parts of southeast Asia, any episodes of bad luck are routinely blamed on the tcho-tcho.
There are very few tcho-tcho living in Western nations. Only a few thousand live in the United States, and they tend to work hard to blend in with American society -- practices like the filing of teeth are left behind in the interest of becoming productive American citizens. However, other practices seem to be more difficult to abandon; three tcho-tcho residents -- one of them a restaurateur -- were arrested and deported in New York City in 1997 for preparing and serving bak bon dzshow...
"Lair of the Star Spawn" by August Derleth and Mark Schorer
At Your Door, "Where a God Shall Tread" by Scott D. Aniolowski, pp. 98-100
Encyclopedia Cthulhiana by Daniel Harms, p. 202