The 'Astolfo Monster Cock' meme stems from a viral mirror selfie involving the character Astolfo from the Fate/Apocrypha series and a can of Monster Energy. The image quickly became an iconic symbol within the 'femboy' and anime subcultures, humorously contrasting the character's cute aesthetic with a suggestive visual pun. It exploded in popularity across Twitter, Reddit, and 4chan, evolving into a meta-joke about the nature of internet traps and bait-and-switch humor. Today, the template is frequently used to represent overwhelming surprises, unexpected discoveries, or niche anime community references that catch users off guard.