Definitions by Coco89

Bhumtrum 

Your Bhumtrum is the vertical groove that lies between your lower back and the top of your bottom.

The Bhumtrum comes from the same body-part-family as the Philtrum - The groove between the upper lip & nose.

The groove formation of the Bhumtrum allows for your partner to gently and easily stroke the area in an affectionate manner.

Bhumtrum by Coco89 March 5, 2012