salty wash
Think of a salty wash as something similar to a facial, where instead of spooge on the face, it's now cum in the hair. This is typically evident in girls walking around the mall who just got up, are wearing their pajamas in public, and forgot to wash the jiz from their hair.
Hey, your girlfriend just walked out of the bathroom with that guy, and it looks like she's just had a salty wash. What a slut.