Unspeakable substances that find their way into your mouth, like earwax, axle grease, and unidentifiable gloop from under your nails. Example: NJGAACK!! I've been picking the dags off the sheep and just licked my finger!
NJGAACK
Meaning of NJGAACK in English
Slang English vocab. Английский сленговый словарь. 2012