crustie

/K R AH1 S T IY0/
noun
  1. 1

    A tramp or homeless young person with poor cleanliness.

  2. 2

    Dried eye mucus.

  3. 3

    A member of an urban subculture with roots in punk and grebo, characterized by antiestablishment attitudes and an unkempt appearance.

Source: https://en.wiktionary.org/wiki/crustie, https://en.wiktionary.org/wiki/crusty