1 definition by Throbo Man31
A pepsi challenge is when a girl bends over in the doggie style position while you sit behind her so she cant see you. You then finger her with your index finger in the vagina and your pinky finger(or ring finger)in the butt-hole. After doing this for a minute or two, you take your fingers out and she must smell them to guess which finger was in which hole.
by Throbo Man31 May 13, 2006