Leviosa comes from Wingardium Leviosa, the levitation charm in Harry Potter, where Hermione Granger corrects Ron Weasley on its pronunciation in the first story. That classroom moment became a widely quoted reference, and short exaggerated readings of the spell later circulated as meme audio on soundboards and short-form video. The ahhh version leans into the mispronunciation for comedy, which is why creators keep reaching for it whenever a scene needs a quick, instantly recognisable magical punchline.