The 'Curlbro' meme is a staple of internet fitness culture, satirizing the archetype of a gym-goer who prioritizes vanity muscles—specifically the biceps—above all else. The term gained significant traction on fitness forums like Bodybuilding.com and Reddit's r/fitness to mock individuals who perform bicep curls in the power rack, effectively blocking others from performing essential compound exercises like squats. It represents the ongoing cultural tension between dedicated powerlifters and those focused solely on the 'beach body' aesthetic. Today, the meme is widely used to highlight gym etiquette fails, the obsession with 'arm day,' and the humorous reality of vanity-driven fitness routines.