This project features Tyler speaking to a character named Dr. TC, who acts as Tyler's therapist and guidance counselor. During the intro to the title track, Dr. TC hints at Tyler's second album, Goblin (2011), to be an additional session with him, stating that there would be three sessions. The songs "Odd Toddlers" and "Slow It Down" were previously released on The Odd Future Tape (2008). The chopped and screwed version, hosted by rapper and his label-mate Mike G, was released for free online. On the one-year anniversary of the album's release, the song "Session" was updated, replacing Brandun DeShay's verse with one by Mike G, after Tyler had a falling out with DeShay. The project is now available on Odd Future's online music store with DeShay's vocals returning to the track. Tyler plans on re-releasing Bastard in a remastered physical form through Odd Future Records; however, since this announcement, nothing has materialised.
Bastard received critical acclaim, and was ranked at number 32 on Pitchfork Media's list of the Top 50 Albums of 2010, while the single "French!" was ranked at number 61 on Pitchfork Media's list of the Top 100 Tracks of 2010.
On December 25, 2010, one year after the album's initial release, it was re-released with brandUn DeShay's verse on "Session" replaced by a verse from Mike G. However, in 2012, the album was re-uploaded to the official Odd Future website with both DeShay and Mike G credited on the song.
"VCR" contains uncredited vocals from Earl Sweatshirt.
"Inglorious" contains uncredited vocals from Hodgy Beats.
The instrumental for "Odd Toddlers" is sampled from "Huit Octobre 1971" performed by French artist Cortex.