CKY (abbreviation of the band's original name Camp Kill Yourself) is an American rock band from West Chester, Pennsylvania. Formed in 1998 by vocalist and guitarist Deron Miller, guitarist Chad I Ginsburg and drummer Jess Margera, the group currently features Margera and Ginsburg with touring bassist Chris Weyh. CKY found initial recognition through its contributions to the CKY video series and Jackass TV series, both of which featured Margera's brother Bam.

After releasing its debut album Volume 1 in 1999, CKY signed with Island/Def Jam and issued Infiltrate•Destroy•Rebuild in 2002, which gave the band its first experience of US chart success. In 2005 the album An Answer Can Be Found followed, after which the group signed with Roadrunner Records and released Carver City in 2009. Miller left the band in 2011, after which Ginsburg, Margera and bassist Matt Deis released The Phoenix on Entertainment One Music in 2017.

CKY has been categorized in genres including post-grunge, hard rock, stoner rock and skate punk. The band's songwriting in the past was typically led by Miller, with production, engineering and mixing handled by Ginsburg. Since Miller's departure in 2011, Ginsburg has taken over as frontman. Miller has since reformed pre-CKY group Foreign Objects (which originally included Margera) and founded 96 Bitter Beings, his own continuance of the material he previously played with CKY.