Grinspoon are an Australian rock band from Lismore, New South Wales, who formed in 1995 by Pat Davern on guitar, Joe Hansen on bass guitar, Kristian Hopes on drums and frontman Phil Jamieson on vocals and guitar. Also in that year, Grinspoon won the national youth radio, Triple J–sponsored Unearthed competition for Lismore, with their post-grunge song "Sickfest". The band's name references Lester Grinspoon, an associate professor emeritus of psychiatry at Harvard Medical School, who supported marijuana for medical use.

All eight of Grinspoon's studio albums have reached the ARIA albums chart top 10. Their sound changed to mainstream rock with the release of their third studio album, New Detention (2002), which peaked at No. 2; likewise, their fifth studio album Alibis & Other Lies (2007) also reached No. 2. The 2004 fourth album, Thrills, Kills & Sunday Pills, peaked at No. 4. At the ARIA Music Awards of 2005 it won the Best Rock Album Award.

The band were signed to Universal Records in the United States by late 1998, and were promoted with the songs "Champion", which featured in Gran Turismo 3; "Post Enebriated Anxiety", which was on the international version of Guide to Better Living (1999); "Chemical Heart", via the internet; and a cover of the Prong song "Snap Your Fingers, Snap Your Neck", from Grinspoon's Pushing Buttons (1998) EP, which was also included on ECW: Extreme Music (1998). On 4 December 2013, the band members announced an indefinite hiatus to pursue individual projects, although they made a return in earnest in 2017. Their eighth studio album, Whatever, Whatever (2024) reached No. 3.