ben wah balls 

Any number of balls, usually of metal and a little smaller than a ping-pong ball, inserted either in the vagina or, especially in gay erotica, in the rectum, and then pulled out slowly, producing for many people an intense sensation of pleasure.

The pull-string broke of the ben wah balls, so he wasn't able to extricate them from his ass.

ben wah balls by bill November 28, 2004