The group was formed on February 14, 1996, by several students at UP Diliman, with original vocalist Reynold Munsayac; he was soon replaced with guitarist Jerry Basco's cousin Jamir Garcia.
The band was signed by EMI Music (Polyeast Records) Philippines in 1998, which resulted in their first platinum-selling album 4th Degree Burn.
[2] This album birthed many cult-favorite tracks like "Agent Orange" which became the rock anthem of the youth during that time and introduced the band to the underground and commercial scene and the song won many accolades like Best Engineered Recording in 13th Awit Awards.
[22] On December 12, 2007, Slapshock released their second compilation album, "Recollection", a collection of their greatest hits and includes a new track, "Sigaw" (Shout).
[28] That same year was another exciting and defining moment as they were tapped to open for the shows of two of their childhood rock heroes and two of the biggest bands in the world – Deftones (February 2011) and Korn (August 2011)[29] when they played in Manila.
The band also shared the stage with big names in metal like Death Angel, Sepultura, Shadows Fall, The Darkest Hour, Trivium, Lamb of God, Megadeth, Cradle of Filth, Lacuna Coil, The Word Alive and Testament.
In 2013, they signed with apl.de.ap's label BMBX Entertainment and will head out to the United States to record their next album to be released, tentatively, in the first quarter of 2014.
It was produced by Apl.de.Ap (Black Eyed Peas) and Shavo Odadjian (System of A Down) and mixed by big names in the recording industry like Ben Grosse and Terry Date.
[36] In January 2014, Slapshock released their single "Unshakeable" featuring Pop Shuvit Guitarist JD Wong as a tribute for the Typhoon Haiyan Victims.
[46] Slapshock was considered as one of the highest paid rock + metal band in the Philippines, actively toured all over the country from 1999 - 2020, and to North America, Middle East, Australia and Asia.
They were also the Philippines’ representative to Bay Beats Music Festival in Esplanade, Singapore and played for Filipino fans in Yes 24 Live Hall, Seoul, South Korea in 2019.
[51] On August 29, 2020, the band released a cover version of Sylvia La Torre's famous kundiman, "Cariñosa" as a part of rock n collab sponsored by Red Horse Beer.
[54] The reason for disbandment was that Slapshock lead singer Jamir Garcia being accused of unauthorized cash withdrawals from the band's royalties from digital sales of songs, as well as misappropriation of talent fees belonging to Slapshock guitarist Jerry Basco, has led to the band's breakup and a lawsuit filed https://www.philstar.com/entertainment/music/2020/10/22/2051521/this-how-slapshock-disbanded-bassist-bares-alleged-years-friction-embezzlement On November 26, 2020, vocalist Jamir Garcia was found dead in his home due to suicide by hanging.
[58] In late 2021, two former Slapshock members Lean Ansing & Chi Evora formed a new band called "Chelsea Alley".
[60] a music video was released on April 25, 2022 On February 14, 2022, former Slapshock member Chi Evora and Lean Ansing along Jeffrey Tam pay tribute to Jamir Garcia in ‘Wala Ka Na’ music video, it also honours other late Filipino musicians, including rapper D-Coy and singer April Boy Regino.
[61] On March 28, 2022, Project Ear along with Greyhoundz's Reg Rubio, Ian Tayao of Wilabaliw, and two former Slapshock members Lean Ansing and Chi Evora released the single "Fade to Black".
[63] On August 12, 2023, Chelsea Alley announced on their social media accounts a birthday celebration event on September 5, 2023 in Social House, Makati to commemorate the legacy of Jamir Garcia, and to have listening party to 4 unreleased songs that they made before Jamir's untimely death in November 2020.