Today's vocab: 鱼尾纹 [yu2 wei3 wen2/yú wěi wén] : literally translated"fish tail lines", or commonly, wrinkles. Examples:

一想到在这段青春岁月里都干了些什么，鱼尾纹就更深了！

Just when I thought I had done everything I could as a young person, my wrinkles get even more pronounced! (Source)

怎样消除“鱼尾纹”

How To Get Rid Of Wrinkles (Source)

And, to bookmark when I get home: a Chinese English dictionary that takes utf8-encoded input.