The 'Mordecai Was a Simp' meme refers to the collective realization among 'Regular Show' fans that the protagonist, Mordecai, often prioritized his romantic interests to an embarrassing and self-destructive degree. Throughout the series, Mordecai’s awkward interactions with Margaret and CJ became a focal point for internet discourse, leading the community to label him the ultimate 'simp' of 2010s animation. The meme usually features screenshots of Mordecai acting desperate, fumbling social situations, or being overly emotional about girls. It gained significant traction on platforms like TikTok and Twitter as a way to mock overly-dedicated romantic behavior, often contrasting Mordecai's simping with Rigby's more detached and chaotic attitude.