self-tan         
noun [ U ] uk/ˌselfˈtæn/ us/ˌselfˈtæn/
 仿晒乳(涂于皮肤上的一种物质,使皮肤看起来黝黑,好象被太阳晒过一样)
a substance that you put on your skin to make it look darker as if you have been in the sun
  self-tan for your face 脸部使用的仿晒乳 
 self-tanning
noun [ U ] ukus
 仿晒(将一种物质擦在皮肤上,使其看起来黝黑,好象被太阳晒过一样)
rubbing a substance into your skin in order to make it look darker as if you have been in the sun