"Ulch!" is an expression of revulsion that is seen in a few circumstances:
- Eating a tainted corpse: "Ulch - That <food type> was tainted!"
- Eating a rustproof item while a rust monster: "Ulch - That <item> was rustproofed!"
- Quaffing a cursed potion of gain ability: "Ulch! That potion tasted foul!"
- Quaffing a cursed potion of restore ability: "Ulch! This makes you feel mediocre!"
- Inhaling vapors from either of the above: "Ulch! That potion smells terrible!"