sacrohumper

sitting on the sacrum of the other party (preferably prone and naked) and humping the sacrum bone for clitoral stimulation.

- my femdom girlfriend is well built and strong and an excellent sacrohumper

sacrum humping

bottom guy (or girl) lies prone, and top/dom girl, who usually masturbates by humping pillows, rides spinous tubercles of lower back. gives guy feeling of being ridden and being a bottom bitch.

-do you miss eda?
-yeah man she was crazy but is an excellent at sacrum humping.

edaxtaposition

sub lies prone and dom girl humps sub's sacrum bone's protrusion, simulating male role for clitoral orgasm.

-My gf wants to peg me but my ass hurts so much.
-you should try edaxtaposition.