Cave Monster 

A penis that lives inside a vagina and comes out every now and then.

"Woah, Pigeon. Is that a cave monster?"

Cave Monster by WhiskeyPigeon October 30, 2016

Cave Monster 

(Cavus Monstrousous) is a rare breed of humanoid monster. It primarily lives in caves where it can use its gigantic ears to detect prey via sonar. Occasionaly one of these pale-skinned, small eyed monsters will blend in with human society. There they steal small children, to drag into their caves to eat or use as child-slaves. They all have colorless, short hair, only located on their head. On the surface most will assume human names such as Sarver, Jim, or Clarence. They are an all male race with no propogative abilities.

The cave monster named Sarver stole into the orphanage to capture young prey.

Cave Monster by DaBoss971 August 14, 2012

CakeMonster 

a girl that flirts with a guy but when a guy asks her out she always says no

Josh:Tavia is such a tease
bill:wat you mean?
Josh: I asked her out and she said no
Bill: She's a CakeMonster thats why

CakeMonster by AlexNae September 27, 2008