Similar to the spastic eagle, it's when a man is on his knees and has three girls standing over him. he has to lick one girl's pussy, and finger the other girls simultaneously with his hands in the form of pistols. You can imagine how this would look like a man weilding two pistols.
One of the best basketball players to come out of the 1970's. "pistol" pete Maravich played for the Hawks, Jazz and Celtics. He Scored 70+ points in a game once without the three point line. A true baller in every sense. He died of Heart complications in his 40's. Pistol Pete is one of the top 50 NBA players ever.