The 'Sorry You're Not a Sigma' meme is a staple of modern internet 'brainrot' culture, typically used to ironically or unironically gatekeep the concept of the 'Sigma Male.' Rooted in the obsession with hyper-masculine archetypes like Patrick Bateman or the 'GigaChad,' this specific phrase gained traction on TikTok and YouTube Shorts within Gen Alpha and Gen Z circles. It serves as a humorous dismissal of anyone who fails to meet the absurd standards of the sigma lifestyle. Whether used as a genuine roast or a layered piece of irony, the meme highlights the evolution of alpha-male subcultures into a bizarre and comedic online identity.