The line is associated with Dave Chappelle, the American comedian known for Chappelle's Show and his dry, deadpan delivery. Short clips of his reactions have long circulated on soundboards and social video, where a single blunt line can carry a whole joke without context. This one spread because it is instantly readable: one voice, one judgement, and no setup needed. Like other short reaction meme clips, it keeps getting reused whenever creators need a fast, funny way to say something is revolting.
About this sound
A short Chappelle's Show clip of Dave Chappelle saying that is gross in a disgusted, deadpan voice. Creators use it to react to gross food and bad takes.
A very short voice clip, under two seconds long, built around Dave Chappelle delivering the line 'that is gross' with flat, unimpressed disgust. His voice stays low and dry, with a slight pause that makes the judgement land harder than a shout would. There is no music or background noise to soften it, just the blunt reaction itself. That directness is why it works so well as a punchline: it instantly frames whatever came before it as revolting, embarrassing or just plain wrong, and lets the audience share in the speaker's disbelief without needing any extra explanation.