Gyatt, often spelled gyat, spread on TikTok and Twitch as slang reacting to someone with an attractive figure, then became a hook in endless parody songs and brainrot remixes. The sticking out your gyatt lyric was repeated, sped up, slowed down and revoiced with unlikely characters, which is how the grandma version took off. Its appeal is the mismatch between family friendly imagery and internet slang, so creators keep reusing it for edits, soundboards and short form comedy where the joke needs no setup.