A thin, flat appendage on the body of a fish or other aquatic animal used for swimming and balancing.

A similar structure on a vehicle, such as a plane or car, that helps with stability or control.

To provide or equip with fins.

To provide a fish with fins or to add fins to something.

A slang term for a person who is overly enthusiastic or obsessed with something.

A slang term for a financial gain or profit.

A thin, flat part of a fish or other aquatic animal used for swimming.

A thin, flat part of a fish's body used for swimming.