Chapter 47 - Third Year - James Potter and the Lumpy Elephant Dung

Remus tests his word-swapping spell on James, replacing "Evans" with "lumpy elephant dung" to hilarious effect during their Halloween feast. The spell proves successful when Mulciber begins spouting endearments like "angelic sweetie-pops" instead of slurs, causing the Great Hall to erupt in laughter. James suffers through an evening unable to say Lily's name properly until Remus finally releases the simple counter-jinx, revealing the marauders' spell was devastatingly effective against the Slytherins' prejudiced language.