Acid Tongue is the debut solo album, second overall by American singer-songwriter Jenny Lewis, released in September 2008 through Warner Bros. and Rough Trade Records. Inspired by jam sessions, the album was recorded December 2007-March 2008 in Van Nuys, California with the intent of capturing a more live feeling than 2006's Rabbit Fur Coat. Lewis worked with a number of guest musicians and wrote the album with boyfriend Johnathan Rice. Lewis, Rice, Jason Lader, and Dave Scher produced the album. Acid Tongue features musical styles ranging from indie rock to alternative country and Americana.

Jennifer Diane Lewis is an American singer-songwriter, musician, and actress. She was the lead singer, rhythm guitarist, and keyboardist for the indie rock band Rilo Kiley.