When a man wears a strap-on facing behind him and fucks two girls simultaneously. One with his dick, and the other with the strap-on. The term originates from the motion in which the man is moving back in forth like a locomotive.
Me and wife decided to explore our sexuality when we called over our next-door neighbor to do a LouisianaLocomotive.
Take a hit of weed and proceed taking a shot of Jack Daniels Whiskey (80 proof) while holding in all weed smoke. Once the whiskey is swallowed, then exhale the smoke. Thus making the Tennessee locomotive.