Credited to Davey MacManus, Owen Hopkin and The Crocketts and produced by Charlie Francis, "On Something" appeared on the band's second album The Great Brain Robbery (2000) and was released as its second single on 3 July 2000.

The writer and vocalist Davey MacManus has provided the following explanation of the song's meaning: We (like most young people) enjoy going out and getting smashed day and night whenever possible.

The song is written from the perspective of looking at one of your friends, unconscious in the corner, covered in vomit, crapping himself and chewing his tongue off, but somehow still enjoying himself.

[3] The review provided the following description of the track: Beginning with a twee accordion solo before bursting into poetic verses and a crashing crescendo of a chorus it typifies the undescribable, cross-genre appeal of the folky punk 'n' rollers.

review also praised the single's B-sides, including the addition of the vocalist Mary Hopkin on "Host" and the "rambling prose" and "persuasive acoustic strum" of the previously unreleased song, "Opposite Ends".