platonic humping 

platonic humping is simply the act of dancing or moving in a sexual way that resembles the act of sex, without any feelings of sexual enticement.

My Aunt and her brother, my Uncle, made the entire room a bit uncomfortable when they began gyrating in the dance room. I had to explain to many outside the family that their dance required such platonic humping for effect.

platonic humping by GsGood March 14, 2013