Comment by zamadatix
3 hours ago
To be fair, I don't think "Slugulus Eructo" (the name) is actually in the books. This is what's in my copy:
> The smug look on Malfoy’s face flickered.
> “No one asked your opinion, you filthy little Mudblood,” he spat.
> Harry knew at once that Malfoy had said something really bad because there was an instant uproar at his words. Flint had to dive in front of Malfoy to stop Fred and George jumping on him, Alicia shrieked, “How dare you!”, and Ron plunged his hand into his robes, pulled out his wand, yelling, “You’ll pay for that one, Malfoy!” and pointed it furiously under Flint’s arm at Malfoy’s face.
> A loud bang echoed around the stadium and a jet of green light shot out of the wrong end of Ron’s wand, hitting him in the stomach and sending him reeling backward onto the grass.
> “Ron! Ron! Are you all right?” squealed Hermione.
> Ron opened his mouth to speak, but no words came out. Instead he gave an almighty belch and several slugs dribbled out of his mouth onto his lap.
I have a vague recollection that it might come up named as such in Half-Blood Prince, written in Snape's old potions textbook?
In support of that hypothesis, the Fandom site lists it as “mentioned” in Half-Blood Prince, but it says nothing else and I'm traveling and don't have a copy to check, so not sure.
Then it's fair that id didn't find it