Badass is an Anirudh composed song from actor Vijay's upcoming Tamil movie Leo, and the single initially released on September 28, 2023 just in the Tamil language. Badass which is officially the second single from the movie [Leo had a theme track titled Bloody Sweet release, before Naa Ready and Badass], is now out in Hindi, Telugu, Kannada and Malayalam languages. The lyrics and vocals credit on each of these versions are listed below:
| Language | Lyrics | Vocals |
| Tamil | Vishnu Edavan | Anirudh Ravichander |
| Telugu | Srinivasa Mouli | Sri Krishna, Sai Charan Bhaskaruni, Anirudh Ravichander |
| Hindi | Raqueeb Alam | Hanuman, Anirudh Ravichander |
| Kannada | Varadaraj Chikkaballapura | Sri Krishna, Sai Charan Bhaskaruni, Anirudh Ravichander |
| Malayalam | Deepak Ram | Sri Krishna, Sai Charan Bhaskaruni, Anirudh Ravichander |
Badass Telugu
Badass Hindi
Badass Kannada
Badass Malayalam
Leo is a production venture of 7 Screen Studios and has Sony Music as its audio label. The movie, touted to be an official adaptation of the graphic novel A History of Violence (1997) is written and directed by Lokesh Kanagaraj. Leo is the third release in the filmmaker's cinematic universe after Kaithi (2019) and Vikram (2022).