Waltuh is an internet spelling of Walter, most closely tied online to Walter White, the chemistry teacher turned drug manufacturer at the centre of Breaking Bad. Fans and editors shortened and exaggerated his name into a meme call, sharing it in TikTok edits, reaction clips and parody videos where a single shouted name does the comedic work. Its staying power comes from that recognition: even viewers who have never seen the show recognise the reference, and the clip is short enough to reuse endlessly without losing its punch.