“Sober” narrates the story of a drunk who has had some troubles with his partner. He knows he messed up and wants to make it up to her (as he believes she’s very special) but will only be able once he sobers up.

In a June 2016 NME Magazine article about the album, Mark Hoppus explained a bit about the track’s background and meaning:

We wrote it with Patrick Stump from Fall Out Boy. The second verse is about a Sid-and-Nancy romance — two lost souls who only have one another and are lost in the world.