A rabbit/chipmunk (whichever you prefer) looking, alienic mutant form of creature which exists deep in the sewers.
This particular gremlin has only been speculated to exist as few records or eyewitnesses are readily available to confirm this ancient myth.
Most eyewitnesses do not live to tell the tale after meeting this
particularly horrendous monster.
The majority of the unfortunates who encounter a Yeyeng do not live to tell the tale. It is believed that the Yeyeng consumes its victims by eating them inside out.
The remaining survivors are
better off dead, having suffered a tremendous trauma. They are regarded as the
mentally retarded people among our society and now reside in various mental institutes.