I think you've got the wrong game then, I haven't written any gas-related lines of dialog (yet). However, I have made a status effect for water bloating and a couple lines about feeling like a water balloon. Maybe that's what you're referring to?
I have made a status effect for gas bloating, but I haven't activated it yet and it doesn't even have an icon. It's in the work and I need to finish it someday, but I'm pretty sure I never showed it in game so far.