smudgy       
adjective uk/ˈsmʌdʒ.i/ us/ˈsmʌdʒ.i/
 模糊的,轮廓不清楚的
(of a mark, etc.) having no particular shape, or without clear edges
  They wear leather jackets and smudgy black eye make-up. 他们穿着皮夹克,化着黑色的烟熏妆。 
 There was a smudgy photograph, apparently taken at a party, which showed them together. 有一张模糊的照片,明显是在一个聚会上拍摄的,照片上他们在一起。 
 See: smudge
 - More examples
 - The mascara always gets smudgy.
 - They worry that their fingerpints might leave smudgy marks on the glass.
 - He pulls a satellite photo up on his screen and points to a big, dark, smudgy blob in the corner.