I'm not sure if this is the phrase you're talking about but there is one that goes like "Gone fishing..." That phrase is used for when someone is going to be away for a while, you can find it in the door of little shops that are closed. [here is a link to a picture of one to give you a better idea] https://img1.etsystatic.com/014/0/5908248/il_fullxfull.443747659_tfbi.jpg

Let's go boating. Let's go sailing. Let's go fishing. Let's go jet-ski riding. Let's rent a paddle boat Rowing a boat is good exercise. Riding the rapids in a kayak can be a dangerous sport. I don't do any of these in my everyday life, however.