A drill and hip hop song, it was written by Pop Smoke alongside producer 808Melo, and was issued as the third and final single from the tape on February 11, 2020.

The solo version appeared again on Pop Smoke's posthumous debut studio album Shoot for the Stars, Aim for the Moon (2020), then finally once more on the deluxe edition of its follow-up Faith (2021).

JLShotThat directed the music video for "Dior", which depicts Pop Smoke dancing with a group of people in a parking lot and at a strip club.

[10] "Dior" is a drill and hip hop song[11][12][13][14] with production that makes use of a bass wobble, Hi-hat, and violin sample that is reversed and chopped up.

[18] Alphonse Pierre from Pitchfork said the song is about the frustration of seeing a friend being jailed, the fun of flirting and buying fashionable clothes, and the "sobering reality" of knowing it could end unexpectedly.

[21] For the song's remix, Anthony Malone, writing for HipHopDX, stated that Gunna raps about "his favorite denim jeans from Mike Amiri, Ricky Owens and Valentino.

Billboard critic Michael Saponara labeled the song an "instant party-starter", and declared it embodies "exactly what made Pop Smoke special".

[29] Charles Lyons-Burt from Slant Magazine said Pop Smoke channels "his untamed aggression into repetitive, elemental lyrics that were colored by his force of personality".

[30] Writing for AllMusic, Fred Thomas opined Pop Smoke throws bars effortlessly and rides an "explosive beat typical to the blunt" and praised its aggressive feel that "flows through the entire mixtape".

[1] In the United States, “Dior” was a sleeper hit, having reached its peak on the US Billboard Hot 100 roughly an entire year after its initial release.

After Pop Smoke was murdered at the age of 20 in a home invasion, "Dior" debuted at number 49 on the US Billboard Hot 100 based on 12 million streams in the week ending February 20, 2020.

[38] It became Pop Smoke's first solo and posthumous Hot 100 hit after collaborating with JackBoys and Travis Scott on "Gatti", which debuted and peaked at number 69 in January 2020.

[44] After Pop Smoke's death, "Dior" rose 40 places to number 33 on the chart dated February 28, 2020, giving the rapper his first top-40 hit in the UK.

[45] The song was later certified double platinum by the British Phonographic Industry (BPI), denoting track-equivalent sales and streams of 1,200,000 units in the UK.

[64] In February of the next year, shortly after his death, the Yard Club in Paris, France, debuted an on-stage hologram of Pop Smoke that virtually performed "Dior".

[65] After Pop Smoke's murder on February 19, 2020, fans gathered in his hometown Canarsie, Brooklyn, in March 2020 and sang the lyrics of "Dior" and his other songs.

[13] Shamira Ibrahim of Nylon stated "Dior" was juxtaposed against a backdrop of burning police cars and groups of protesters marching down Eastern Parkway.

[74] The official remix of "Dior" features American rapper Gunna and was included on the deluxe edition of Pop Smoke's second mixtape Meet the Woo 2.