Boot Box 

A sexual act in which a person inserts their boot-clad foot into a woman's vagina. Like fisting, but with a shod foot.

Tom: Hey, why is your boot squeeking? Did you step in a puddle?
Bob: Nope, just got through giving Sandy a boot box.

Boot Box by Dezzish June 30, 2015

Bootboxing 

Making music using only the sounds of your car. You can use the doors, boot, bonnet, wipers, petrol cap, indicators etc.

"Did you watch that dude Bootboxing?"

Bootboxing by Good'un. October 12, 2009