The act of masturbation, typically female. A reference to the recent movie Black Swan, in which the plot pretty much revolved around Natalie Portman's masturbatory habits.
Karen: Katie sure has been in her room for a long time.
Liz: She's probably doing the Natalie Portman.
Karen: Oh, that probably explains why she took that underwear catalogue.
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A date where only the guy considers or considered it a date.
Dude, I totally thought I was gonna get some last night, but she really did just want to exchange vegan recipes--turns out it wasn't a date, just a natalie portman.
The Aiden Portman Jelq Method or A.P.J.M, is a method used to enlargen the penis. To do this method you have to tape your wee wee to the ceiling fan, or if you dont have one use the nearest electric hand dryer.
"yo guys i definitely recommend this new type of jelqing called the Aiden Portman Jelq Method!!! i grew 4 inches in the last 6 months!!!"
Home of Ipswich Town FC. Awful stadium for an awful team.
Yuck, never go to Portman Road, it smells.