German term "Usche" means a non-respected or non-respectable young woman with a taste of low social background or bad history especially about men. It's youth language and developed from Nickname "Uschi" which is a short form of German name "Ulrike" and was very popular around the 1980s-1990s but now has low reputation. Especially used in southern Germany around Munich in Bavaria where "Uschi" was very common. Can be used in different contextes, similar to american "chick" especially by young women talking about another young woman.
Mein Ex hat eine neue Usche." - "My ex-boyfriend has a new chick.