Heelgrabbing 

A sexual position used with oral sex. The giver will grab her heels with her hands behind her back. The female therefore has no hand control of the penis and the male can control everything. Heelgrabbing is a popular position for extreme blowjob porn sites and deepthroat porn sites.

That slut is really great at heelgrabbing, she really lets me bang her throat.

Heelgrabbing by Olivier Jaques October 1, 2007