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[[Image:Roro.jpg|right|thumb|250px|A Ro/Ro vessel]]

[[Image:Roro.jpg|right|thumb|250px|A Ro/Ro vessel]]

'''Roll On Roll Off''' (often called '''Ro-Ro''', '''RoRo''' or '''Ro/Ro''') refers to a method of ocean [[cargo]] service using a vessel with ramps which allows wheeled vehicles to be loaded and discharged without cranes.<ref>U.S. Department of Transportation Maritime Administration: Glossary (pdf) [http://marad.dot.gov/documents/Glossary_final.pdf]</ref>

'''Roll On Roll Off''' (often called '''Ro-Ro''', '''RoRo''' or '''Ro/Ro''') refers to a method of homosexual fluid exchange in which one man "rolls on" to the other, who in turn "rolls off".