Skiffing refers to the sporting and leisure activity of rowing (or more correctly sculling) a Thames skiff. A Thames skiff is a traditional hand built clinker-built wooden craft of a design which has been seen on the River Thames and other waterways in England and other countries for nearly 200 years. Sculling means propelling the boat with a pair of oars (blades) as opposed to rowing which requires both hands on a single oar.