MrBeast, the online alias of Jimmy Donaldson, became one of YouTube's biggest creators through large-scale stunts and giveaway videos, making his name a natural ingredient for meme audio. 'Stop the cap' is slang for 'stop lying' that spread through hip-hop lyrics and short-form video before becoming a staple caption and soundbite. Clips like this one, labeled as version-style uploads on soundboards, get reused because the combination is instantly readable: a famous creator's energy plus a blunt callout. It survives as a quick reaction stamp for dubious claims.