Fishing is the activity of trying to catch fish.
When Dave Lister was a youth in Liverpool, he would often go fishing in the local canal with his friends. Even though there were no fish in it, it was something to do to pass the time. Instead, they would go condom fishing. Once Lister was proud to have caught a "two-pound, black ribbed knobbler". ("Dimension Jump", Series IV)
Three million years later aboard the spaceship Red Dwarf, Lister and his crewmates (Cat, Kryten, and Holly) decided to take a Starbug down to an ocean moon and do a bit of fishing. Even though there were no fish there, they intended to just pretend and hang their fishing lines into the water. They tried to sneak out without waking Arnold Rimmer, intending to leave Rimmer behind, but Rimmer woke up and found their note about the fishing holiday, and insisted on coming. ("Dimension Jump", Series VI)
Cat often sings the "Fish Song" when fishing (for example, when fishing the robotic goldfish Lennon and McCartney out of the fish tank in "Future Echoes", or in the restaurant in "Better Than Life") Other times Cat did not need to fish, such as when ordered Trout a la Creme from the vending machines, or eating the aftermath of fish rain.
- Mimian bladder fish were presumably fished on Mimas.
- In the first novel, it is revealed that Dave Lister initially ended up on Red Dwarf after a drunken Monopoly pub crawl around London with his friends to celebrate his 25th birthday. When he awoke, he was on Mimas, one of Saturn's moons, wearing a lady's pink crimplene hat and a pair of yellow fishing waders, with no money and a passport in the name of "Emily Berkenstein", and a worrying rash. Lister signed up with the JMC in order to get back to Earth.
- Angling article on Wikipedia