An unnamed god of hedonism was the predecessor of Marimbo as the god of hedonism. Prior to his death, he was travelling across different worlds, challenging mortals to drinking contests for the fun of it. When he learned about Marimbo's homeworld, he travelled there in an instant, grabbed Marimbo and started dishing alcohol in preparation for a drinking contest with the giant monkey. The god's death's circumstances are left unclear, but it's suggested in-game that Marimbo defeated him in a drinking contest and that the overdose of alcohol killed him, which might have drained his divine energy into Marimbo in some way. Marimbo later met his followers, who were all in mourning over his death, and after cheering them up with a celebration, they declared Marimbo the new deity of hedonism. 
- ^ Marimbo, "Cabbage Facepunch Bonanza", RuneScape. "There was a statue nearby that turned out to be a dead god. And a huge, empty wine barrel. Someone later told me he was a god of hedonism too. He was on a trawl of different worlds, challenging mortals to drinking contest for a bit of lark. So when he found out about a world of giant monkeys he went there in a flash, grabbed me and started dishing out the booze. It's a pity I never got to know him. Everything I found out was from his followers, who were all in mourning. So I thought 'Marimbo, let's cheer these guys up', and called for more wine. Everyone perked right up once we cracked open a new barrel, I can tell you. [...] When we were done they proclaimed me the new god of having a good time. And since that meant enjoying myself all day, who was to argue?"