A drummer who's name doesn't stand for blowjob, but for Barrie James.
He was the drummer of Procol Harum from 1967-1977 and was one of the greatest drummers of rock with his unique ways of drumming.
He died in 1990.
Person A: Who's that on your shirt?
Person B: BJ Wilson.
Person A: Haha, BJ.
Person B: No, it stands for Barrie James.