The line comes from Kevin Hart's 2010 stand-up special Seriously Funny, where he repeats say it with your chest while recounting a confrontation and urging louder, more confident speech. Clips of the bit circulated on YouTube and social media, and the phrase became a standalone reaction detached from the full routine. Its short, shouted delivery made it easy to reuse in memes, edits and comment threads, and it remains popular whenever someone wants to humorously demand that another person speak up.