The 'Mustard!' meme stems from the explosive opening of Kendrick Lamar's chart-topping Drake diss track, 'Not Like Us.' Before the beat kicks in, Kendrick provides a high-energy shout-out to producer Mustard, delivering the iconic 'Mustard on the beat, hoe' tag with unprecedented intensity. The moment became a cultural phenomenon following 'The Pop Out' concert and the song's music video, symbolizing victory and a shift in West Coast hip-hop dominance. It is now widely used in meme culture to signal the arrival of something impactful, a great musical drop, or simply to celebrate the undeniable chemistry between K.Dot and Mustard.