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.
When a guy eats out a girl then makes out with her. Like a make out but with pussy juice all over your mouth.
Yo bro, i went down on this girl for hours last night then immediately made out with her. I boxed her out real hard.
My boyfriend was eating me out and I came but then he came right up and made out with me! I got boxed out!