Invented by The College Dropout Bear, it's when you snort coke out of a hooker's butt, as made famous by Leonardo DiCaprio in the 2013 movie "The wolf of Wall Street".
Him: Dude, where were you this weekend?
Other Him: Man I was on this boat getting it in and getting fucked up!
First Him: How in?
Other Him: I did the Berenstain Bare on this phat ass'd model chick.
First Him: 0_0!