grouda Share definition Flag the dried crust between one's butt cheeks when they forget to wipe after pooping. After a while, it gets itchy. Suzy: Why are you scratching your butt? Paul: Sorry, I was in a hurry, now I got that grouda! grouda by Butts Up June 12, 2009 0 0 Get merch Get the grouda mug. Buy Now — $32.95 See more merch