Shut Your Mouth is the fifth studio album by Australian punk rock band Frenzal Rhomb, released on 20 November 2000. Originally scheduled to be released on 6 November, it was the first and last Frenzal Rhomb album to be issued in Australia on the Epic label which dropped the band less than six months later. It was released by Fat Wreck Chords around the world and re-issued by Epitaph/Shock Records in the band's native Australia with the U.S. track listing.

In a 2023 interview, vocalist Jay Whalley described Shut Your Mouth as being "universally regarded as our worst record".^[1] Guitarist Lindsay McDougall agreed with this assessment of the album, stating flatly "it sucked". McDougall cited a combination of uninspired songwriting and a poor relationship with their record producer as reasons behind the album's shortcomings. ^[2] Both Whalley and McDougall noted that the upside of the experience was the large cash advance from their label Sony, who dropped Frenzal Rhomb shortly afterwards without requiring the band to pay this money back.