Usually performed on an unconsious person. Their own finger is taken and stuck up their ass. You then perform a dirty sanchez with it and transition to a rusty hook.
Next time my light weight cousin drinks to much and passes out before 10:30 he'll be walking funny and "talkin shit" the following morning as a result of the bansai brian that he so lovingly received.
by J. Krueger April 02, 2007