Thom Yorke wrote the song about a narcissistic friend of his, which on closer inspection is showcased by the imagery in the lyrics, a parallel to earlier My Iron Lung EP track 'Lewis '.
He also says that it was somewhat of a competition between him and Jonny Greenwood to see who could fit the most chords into a song. 'Just' is especially notable for Greenwood's guitar solo.
In the UK, this single was available as two CDs: the first one featured different tracks, and the color of the album art on the second single was inverted.
'Just', a charity record for the Help EP, was refused a playlist by Radio One on the grounds that it was not 'radio-friendly'.
In 2007, NME placed 'Just' at number 34 in its list of the 50 Greatest Indie Anthems Ever.