Basement Monster

Someone who never leaves their own home, specifically their room.
Have you seen Derek lately?

No, he's a basement monster man. I don't even think he showers.
by SJeffries April 09, 2009
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Cave Monster

A penis that lives inside a vagina and comes out every now and then.
"Woah, Pigeon. Is that a cave monster?"
by WhiskeyPigeon October 31, 2016
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Grotto Monster

A greatly feared beast that resides in small shaded bodies of water. Preferred habitat is a cave with a waterfall covering the entrance. The Grotto Monster will spring upon prey and destroy them with powerful jaws and arms eating nearly every body part. Due to ferocious attacks he remains perhaps one of most feared monsters in Northern California although he has been spotted several times in southern California.

No one has every captured footage of the Grotto Monster, because no eyewitnesses are ever found. The earliest recording of the Grotto Monster's Legend is somewhere in the early 1980's. Although the sources are plentiful they remain spurious.
"Oh my God! Run for your lives its the Grotto Monster!"
by DR Griffin July 28, 2009
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Motherfuckin' Monster

"Endy's catch in the 2006 NLCS was awesome!"
"He's a motherfuckin' monster!"
by JasonXXIV October 20, 2011
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Cringe Monster

A person who is disgusting or does disgusting things.
Chaz: Er, look at kerry, she has really greasy hair!
Emuls: I know! What a Cringe Monster!

Emily: I slept with my best mates boyfriend..
Chaz&Em: What a Cringe Monster!!
by Morrwick June 15, 2009
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Monster cockadoodledoo

Sex as the sunrises
Me and shana did the old monster cockadoodledoo this morning
by Mastercaboose June 26, 2016
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feeding the monsters

Monsters are in the toilet like in the movie Ghoulies. You have to go poop and feed them.
Mike says I'm going to go poop. Jane says your feeding the monsters.
by Tulsadude2009 December 23, 2016
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