Jizz mixed with dirt. Usually found in parks or other public places of high hobo trafficking. May also be found in locals frequented by ugly college freshmen or in dormitories occupied by computer science majors who bathe infrequently.
If one becomes extremely aroused during a dust storm on the central plains, he will gledge in his pants.
Aw man, I totally just stepped in some gledge!
Dude, that railing is covered in gledge!
It smells like dirt and bleach...we're in a park...must be gledge!
Dad: Hey son, where did you dig the shit hole?
Son: Just look for the pool of gledge, it's right next to it!