nail art       
noun [ U ] uk/ˈneɪl ˌɑːt/ us/ˈneɪl ˌɑːrt/
 美甲
the activity of making designs on people's nails, or the designs themselves
  Forget French manicures, the latest trend is nail art. 忘记法式修甲吧,最新的趋势是美甲艺术。 
 Consider nail art on your toes. 可以考虑在脚趾上做美甲。 
 - More examples
 - She does pretty good nail art.
 - Sporting elaborate nail art and parkas from ultra-niche Japanese labels, she promotes must-see catwalk shows.
 - A nail art kit will guide you on how you can dress up your nails perfectly and professionally.