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1.
1)A movie made in 2005 and starring Steve Carell about a 40 year old man who is a virgin and his friends keep trying to help him lose it, very very funny.

2)Insulting term (mainly used by men) meaning that a person is such a loser that they could never get laid.
2)"Dude, your such a fuckin' loser! you'll never get any pussy! you're gonna be the 40 year old virgin"
by Blooddiamond21 August 22, 2007
 
2.
Men that live with their moms and act cool on Madden Message board but are really pathetic lowlifes.
RobDeezy. The 40 year old virgin
by THE DEEZY August 20, 2008
 
3.
A man/woman who is still a virgin at the age of 40.
John : I didn't know Barry was a 40 year-old virgin!
Alice : Yeah. That guy needs to get laid.
by ParanoidAndroid August 24, 2006
 
4.
One pump and then you nut.
Joe: Hey Bob I gave your mom the 40 year old Virgin.
Bob: What's that?
Joe: One pump and then I just nutted in her.
by Doe John June 19, 2007
 
5.
the worst steve carrel movie, a horrible film that was not funny and generally over-hyped. the movie had a funny concept but wasn't funny.
dude did you see 40 year old virgin?
you mean that not funny movie from those guys that have a reoccuring penis concept in all their movies?
by pure_genius22 May 10, 2008
 
6.
YOU, LOSER!!

Its also the name a very popular movie made by Steve Carell.
You are a 40 year old virgin because you will not have sex until you are 40.
by Theory's apprentice June 30, 2006