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The term is short for Male Pregnancy and is most often used in fan fiction to describe the surprising occurrence of pregnant males. It is most typically seen in male/male pairings, but has occasionally sprung up in other situations. Is most commonly used as an adjective.
The Arnold Schwarzenegger film, Junior, was a Mpreg film.
by For-Chan March 18, 2004
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Jul 24 Word of the Day
It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.
“Where did you go after we left the pub?”
Dunno, CRAFT.”
by AKACroatalin November 07, 2015
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2
in fanfiction, a male pregnacy.
Author's notes: includes m-preg, so you don't like, don't read!!
by The Cloaked Schemer May 06, 2008
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3
Often used in fan fics, it is used to describe a story where a man becomes pregnant.
Draco/Harry story
Rated PG13 for Mpreg
by Boochies October 29, 2003
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4
Short for male pregnancy. Men are sometimes pregnant in slash fiction stories.
"What's an mpreg?"

"When a man is pregnant."
by AempoleonM September 03, 2011
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5
1. When two males make a baby together (without the help of a female). Usually used in some kind of fanfic.
2. Not a file type
Right useage:
girl: Squee, did you hear Branden and Sean had an mpreg baby together? They're so Kawaii!
boy: What, mpreg?! Ewww.

Wrong useage:
girl 1: Hey, did you get kawaiivideo.mpreg I sent you?
girl 2: Yeah! Hey wait, it doesn't open...
random dude: ...You realize that is not a file type, right? I think you mean kawaiivideo.mpeg.
girl 2: Gosh, you're right~!
by isthisawsome_yn April 21, 2008
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6
The term used for a male getting pregnant,in fanfics,movies,sometimes art
Dark Humour,an amazing Hagaren fic by the talented authouress FelisDeityus,is an Mpreg fanfic.EnvyxEd
by wfsdf July 24, 2005
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