The phrase is an idiomatic exclamation found in the video game Warframe . It is used by characters like Eleanor and Arthur as a pseudo-religious or cultural expression, where "Lua" refers to the moon (Earth's moon in the game's lore). Contextual Usage in Warframe
: Characters use it similarly to "Oh my God" when witnessing something terrible, such as the spread of the Techrot or the appearance of monsters. sweet.lua
: While "Lua" is also a real-world programming language used for game modding and scripting (including within the Warframe engine), the specific phrase "sweet Lua" refers to the celestial body within the game's narrative rather than the Lua.org software. The phrase is an idiomatic exclamation found in