1. To deprive another's vagina (aka box) of action. See cock block.
2. To prevent another from gaining access to the vagina. See also cock block.
3. In basketball, to prevent an opposing player from grabbing a rebound and scoring, by positioning oneself between the opponent and the basket.
1. Mary wanted to get with James at the party, but her ex-boyfriend showed up and boxed her out.
2. Joan was tired of Tom's advances, so she called her girlfriends over to box him out.
3. No one could ever box out Wilt Chamberlain.
by ral34 August 2, 2005
(v) to not act like a man, particularly in social settings; to "puss" out or "bitch" out; the opposite of "manning up"
You've gotta take another shot, bro. Don't box out on me. I thought you were my ace-wingman.
by ROI Guy December 10, 2006
The female equivalent of the cock block. Both guys and girls can be boxed out.
My friend, Elyse, pulled a nasty box out when I was trying to run my game on that ho bag.
by numberone2getherfan February 9, 2005
verb.

Also hotbox. Smoking pot in a confined and/or airtight area such as a car with all the windows wound up, room with all windows/doors closed, etc. Or even a tent with the zipper door closed.
Johnny: Do you want to box out my car tonight?
Henry: Sure, John. Bring your car up to my back yard at 8 pm.
Johnny: Will do. And I'll bring some weed and my bong?
Henry: I've got two tinnies already, just bring the bong.
by JezzBomb May 2, 2011
box out (Verb)

-When a woman steals the attention of a potential love interest away from another woman.
-the female version of the commonly known phrase "cock block"
"I didn't mean to box out Trish when she was trying to talk to Ian last night at the skating rink!"
by Brutus and Saleel January 27, 2010
The female version of a cock-block. Where someone gets in the way of a girl who is trying to hook up.
i was having a great night till i got boxed out by my fking friend Allison.
by Rankrank March 8, 2009
I was watching this porno, and out of nowhere, the black girl starts "boxing out" the Asian.
by Ben Solar System November 23, 2009