"Dad Gum" is a popular song in the Cars universe. In Heavy Metal Mater, it is written and performed by Mater's band, Mater and the Gas-Caps. The song initially started out as a garage rock song, but was later turned into a heavy metal song.
The song was released through Dinoco Records, and was later performed on the Rust & Roll Tour.
- "Rust & Roll" is a pun on "Rock & Roll".