Leonardo "Flaco" Jiménez was an American singer-songwriter and accordionist from San Antonio, Texas. The nickname 'Flaco' means 'skinny'. He is known for having played conjunto, norteño and tejano. Jiménez was a solo performer and session musician, as well as a member of the Texas Tornados and Los Super Seven.
Over the course of his seven-decade career, he received numerous awards and honors, including Lifetime Achievement Awards from the Grammys, Americana Music Awards, Tejano Music Awards, and Billboard magazine.