A tchotchke is a small, decorative object that's not valuable or precious. When you travel to a foreign country, you might buy some tchotchkes to give as gifts to your friends back home.
A tchotchke is some kind of trinket or bauble, like inexpensive jewelry or the prize you get in a cereal box. Less often, tchotchke is used to mean "pretty girl or woman." The word comes, via Yiddish, from a Slavic root, and over the years it's been spelled in numerous different ways. When you pronounce tchotchke, the first t is silent.