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3.
To have intercourse with ones sexual partner with one leg up in the air.
Dude you look tired.
I know, I was up all night crossing the border.
by StantheMan'08 January 23, 2008
 
1.
As a male, having sex with a Hispanic female.
Ken: "Dude did you hook up w/ that fine ass Latina last night?"

Ryan: "Hell ya dude, I fucking crossed the border!"

Ken: "You went crossing the border? Nice. Slap hands!"
by Bro Fuss November 22, 2009
 
2.
When a man's cum drips out of a women's pussy and ends up in her asscrack.
When I was finished fucking this slam pig, she laid there as my jizz was crossing the border.
by Dradran July 06, 2013