nipliptical
A sexual partner used as exercise equipment, specifically for aerobic, standing, rear-entry penetration. To qualify, the penetrator must manipulate his partner's nipples.
co-worker: "Bob, you're looking fit."
Bob: "You bet! It's amazing what 10 minutes a day on my nipliptical does for the glutes."
Bob: "You bet! It's amazing what 10 minutes a day on my nipliptical does for the glutes."