Half Thong 

A loop of elastic & spandex fabric that wraps around one hip, between buttocks, and covers your junk. The loop can also be longer and go over one shoulder instead of the hip. Essentially a Half-Mankini (A Half Body Thong). A backless version of the Half Body Thong would be the Junk Sling; a pouch for one’s Junk and an elastic or cording drawstring over the neck.

Only a few guys can feel comfortable wearing a half thong to the beach.

Half Thong by I'm a guy and I wear Speeods October 9, 2014

half a thing 

a casual relationship with someone, not quite a 'thing' in the sense both people like each other an there is chance for a relationship to develop but where the said people get off when together and usually drunk

man 1: he pulled her again last night
man 2: again ah they well have half a thing going

half a thing by Friday1878 October 12, 2008