Chestnuts Roasting On An Open Fire Guy, also called the Chess Nuss Guy or Man Singing 'Chestnuts Roasting On An Open Fire,' is a viral karaoke recording of Smule user Anuc (@AnucAtittawan) covering Nat King Cole's 'The Christmas Song (Merry Christmas To You).' The clip is famous for Anuc's phonetic, heavily accented take on the English lyrics, which turns the opening line into something closer to 'chess nuss roasting on a open fire1.'

The recording became a mini-genre of its own once TikTok viewers began transcribing the vocals in the comments and pasting the audio into exploitable meme formats. Anuc himself is a prolific Smule user based in Italy, with more than 16,700 followers and over 122,000 karaoke recordings on the app as of late 20222. He often records duets with a Smule partner named 13336hera, who reposts their collaborations to TikTok under the handle @heraloani3.

The core joke is the mismatch between the well-known Nat King Cole lyrics and Anuc's phonetic pronunciation, so most remixes lean on the audio rather than the visual. People typically pair the isolated vocal with subtitle overlays that spell out what Anuc sounds like he is singing, drop the clip into reaction-style templates such as Yeah I'd Like To Solve The Puzzle, or cut between the original Nat King Cole recording and Anuc's version for a side-by-side gag6.