Dumb Dumb (Red Velvet song)

It was written by Seo Ji-eum of Jam Factory and Kim Dong-hyun, while production and arrangement was handled by LDN Noise, Deanna Dellacioppa, Tayla Parx, and Ryan S.

[6] Following the release of their first EP Ice Cream Cake in March 2015, it was reported that Red Velvet would return with their first full-length studio album in early September 2015.

On September 3, a series of image teasers were revealed on the group's official Instagram account, along with the album's ten-song track list.

LDN Noise had previously worked with Western artists such as Nick Jonas and Nathan Sykes and although the duo had produced for other South Korean groups such as Red Velvet's label mates TVXQ and SHINee, The Red, in which they produced four tracks including "Dumb Dumb", marks Bonnick and Chapman's first time collaborating with the group.

Described as a "brassy" and "genre-mashing" dance-pop track with R&B, funk and hip-hop elements, the song contains heavy hi-hats and snare line, percussive claps and horn instruments.

[8] Its lyrics, which were written by Kim Dong-hyun and Seo Ji-eum of Jam Factory, are the thoughts of a girl who compares her awkwardness in front of a romantic interest to becoming a mannequin.

[12][13] Rolling Stone claimed the video "stood out with a distinct aesthetic and muted palate" and that "any of the dozens of the setups packed into it could appear in the pages of your favorite oversized, overpriced lookbook".

[9] Dazed Digital named it their number one K-pop track of 2015 and stated that the song "marked a monumental, career-crowning musical tornado".

[20] Noisey put it at number two on their Top 20 K-pop Songs of 2015 and praised it for its "endless momentum—sustained across a Michael Jackson tribute rap break, a blindside bridge borrowed from some other sonic world, and a chorus that interrupts itself to laugh at all the awesomeness everywhere".

[21] Writing for Yibada, Romellaine Xyene Arsenio commended the members' impressive vocal improvement and thought the "challenging notes and raps were delivered smoothly".

[22] However, Kim Do-young of the South Korean online magazine IZM found the song "confusing" and the vocals of the group "distracting" in his review of the album.

[24] Rolling Stone placed it a number nine on their 10 Best Music Videos of 2015[14] and was named "Choreography of the Year" by GQ Korea in their November 2015 issue.

PERC%NT, Jang Jane, Giant Pink and K JUN's R&B cover of the single was released on August 18, 2017, along with a music video.