"Buying GF" is an ironic expression indicating an interest in purchasing a girlfriend within the MMORPG Runescape for in-game currency. According to a post in the /r/OutOfTheLoop subreddit, players in the game Runescape often had in-game girlfriends which many speculated were actually men masquerading as women to scam users for gold and items. The "buying gf" expression was subsequently invented as a joke to mock the online relationships. The original screenshot that circulated online is below, and has been meme'd for years, made into art pieces (see above), cosplayed and even made into physical products.
