From Comedy Central's "Halfway Home", a ceremony in which one picks up three pebbles of differing size with one's ass cheeks.
One must then walk forward, and drop the pebbles, one by one, smallest to largest, into somebody's hand.
A silly way of calling someone a Pervert. The v in pervert is replaced with a b because of how Koreans sometimes pronounce it. Originates in Twitch Streamer HAchubby's channel.