basically to have sex lying down, cannot be vertical
or doing the crazed dance of the time, also while lying down
also can mean 2 monsters having sex, lying down
i walked in a they were doing the horizontal monster mash
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This word was created in an episode of Futurama.
This word means two monsters, aliens, etc. having sex with each other while standing up.
"I Guarantee That By The End Of This Night You'll Be Doing The Vertical Monster Mash"
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Used by Phillip J. Fry from the TV show "Futurama" to describe sex.
Leela let's ditch these aliens so they can do the Sideways Monster Mash.
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sex with a chick... fucking a chick, banging a chick.. that sort of thing
omfg! Their doing the Horizontal Monster Mash on my leg!!! (WTF?)
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When a person has a bowel movement while showering and proceeds to force it down the drain with his/her foot.
I could tell from her glistening brown toes that Ethel had done the monster mash this morning.
The act of having mashed potatoes on the female genitals while a male fucks her through the mashed potatoes
The act of "the monster mash 2 Frankensteins revenge" is when you paint the mashed potatoes green
I just hit the monster mash with your sister
When a women puts mashed potatoes in her vagina and has a man fuck her without a condom . Then the two eat the mashed potatoes. If the mashed potatoes are expired then it is called "The Monster mash 2, Frankenstein's revenge"
Me and your mom did the monster mash last night