the process in which people drill holes into their rectal cavity explicitly for the purpose of making a Bong Booty
"Grab the drill and spread your legs and maybe shower,its time for Bong Booty Surgery"
a butt which,after undergoing Bong Booty Surgery, is used to smoke weed/tobacco from (using the anus as the hole you suck the smoke from and the separate hole you explicitly drilled into your rectal cavity during Bong Booty Surgery you use as the bowl and downstem.
"Party at my place tonight,I got a Bong Booty and shit's gonna get lit" -literally