Created in ancient Greece as a way to honor generals and people of great power. The person starts at the end of a large showering area then begins running to eventually start sliding on their knees. While sliding, guys line up on both sides of the path, shooting semen on the person as they pass through. The BK stands for 'Bukkake' and the Slider part is fairly straightforward. Currently practiced mostly in San Fransisco due to the large grouping of public shower facilities.
Tony's the man! He took a BK Slider from the whole team!
You should stay.. I heard there's gonna be a BK Slider in about 5 minutes.
That shit is gay. Like BK Slider gay.