You bend a girl over in your bay window and do her from behind while your brother or friend is over, switch with your friend/brother and let them do your girl then run outside naked and wave to her from the outside the window.
In the 1997 movie Titanic, when Leonardo DiCaprio is nailing Kate Winslet in the car, she reaches out with her hot, sweaty hand towards the window as if to grope it during the height of her sexual pleasure experiance.
Tom: Dude, I was slamming Kandi last night. She is a total window grabber. I made her clean all the windows in my car.
An activity that envolves throwing bouncy balls or tiny pieces of uncooked meat at the second story window of an attractive girls home. Most common in warm climate areas such as California, Florida, and Texas. Infamous in Chicago, Illinois though.
Adam Levine decided to go Window Dopping on Martha's house last night. When a piece of sirloin stuck to her window, she didn't even know what hit her.