Rage Guy, often identified by the caption 'FFFFFUUUUUUUU-', is the progenitor of the Rage Comic genre that dominated the internet in the late 2000s and early 2010s. First appearing on 4chan in 2008, the character was initially used in a four-panel comic strip to depict the intense frustration of toilet water splashing back during a bowel movement. The MS Paint-style drawing of a man with a contorted, angry face and bulging veins became a universal symbol for everyday annoyances and relatable failures. As the foundation of the Rage Face universe, Rage Guy paved the way for other characters like Trollface and Forever Alone, cementing its place as a cornerstone of internet culture and meme history.