"I can tell by the crunch" is an Ai generated brainrot monster that is commonly used in the comment section of Tiktok videos to describe/visualize a gross or chudly sounding character/person. Popularized by the original tiktok sound where someone is chewing on chips in an online game with VC, and the user with a deep monstorous voice asks "are those doritos?". Shocked, the entire VC says "how did you know?" The monstorous voice replies with "I can tell by the crunch"