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mancubus 

A very grotesque and fat, but also incredibly powerful demon that results when an incubus mates with a succubus.
An enemy in the "Doom" sereis of games
mancubus by Tsumari September 15, 2005
Related Words
A male butt that is nice,big,and round. Manbutts come in all types! hairy,beefy,muscular,jiggly,soft,hard,tight,or loose... The Manbutt is mostly enjoyed by gay men who fuck it and/or toss its salad/rim it or just flip it,rub it up,and smack it,slap it, spank it ,and wank over it. Straight women may also enjoy the manbutt.. She may grab onto it and squeeze while having sex.
girl:look at that hot guy over there!

gay guy: girlfriend he is so flat! I need a manbutt.

girl: a manbutt? like a guy with a fat ass that you can squeeze?

gay guy: Yes girl manbutts are so hot!
Manbutt by sexygayboy July 17, 2009

manbutter 

it is just another term for semen.
awe dude he got manbutter all over that chick!
manbutter by pablois May 22, 2006

Mancubation 

The process through which a human embryo is incubated inside of a man.
Example 1: When all else failed, the partners turned to mancubation to have a child.

Example 2: Sean loves Bob Schneider so much he would mancubate his babies.
Mancubation by Megapedia March 27, 2010

marcbutt 

A general name for a guy who makes disgusting jokes about butts, assholes, shit, etc. as well as sexual acts relating to butts and or shit. Marcbutt also knows the name of obscure sexual acts. Can be used as a term of endearment if you enjoy Marcbutt's jokes and knowledge.
A chick gave me a stingbug last night when we were fucking and it reminded me of Marcbutt.
marcbutt by NiGroo May 17, 2011

mancubus 

Fat bloated animal with little or no use to the world. See John Woods
I work for a mancubus
mancubus by Bill Ding August 21, 2003