The term 'Shell Mover' refers to two different jobs. The first is an OAR, which stands for 'Outboard Automotive Repairman.' This job involves repairing and maintaining outboard motors, such as those used on boats. The second job is a SNAIL, which stands for 'Specialized Nautical Assistance and Logistics.' This job involves providing specialized assistance and logistics services related to the operation of boats and other watercraft. Both jobs involve moving shells, such as boat hulls, from one place to another.