This mixtape features Tyler speaking to the character, named Dr. TC, who acts as Tyler's therapist and guidance counselor. The title track, Bastard contains Dr. TC given hints about Tyler's debut albumGoblin (2011), to be an additional session with him, stating that there will be three sessions. Both songs "Odd Toddlers" and "Slow It Down" were previously released on The Odd Future Tape. The chopped and screwed version of the mixtape by Mike G, also exists and was released online.
The latter is the one-year anniversary from the original release, the song titled "Session" was updated, replacing Brandun DeShay's verse with Mike G's, after Tyler had falling out with DeShay. The mixtape 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 their record label Odd Future Records.
Bastard 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, 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 are credited to the song.
"Inglorious" contains uncredited vocals from Hodgy Beats.