"Mouth" is a song written by Australian singer-songwriter Merril Bainbridge and produced by Siew for Bainbridge's debut album, The Garden (1995). It was released as the album's first single in October 1994 in Australia, then was re-issued in 1995. "Mouth" became her biggest hit, peaking at number one on the Australian ARIA Singles Chart for six consecutive weeks and in Canada for one week. The song also became a top-five hit in Iceland and the United States and reached number 17 in New Zealand.

The Garden is the first album by Australian singer Merril Bainbridge, released in Australia on 31 July 1995 by Gotham Records. The album has a main genre of alternative pop songs — some written by Bainbridge herself, Owen Bolwell, Stan Paulzen and Siew. The Garden debuted inside the top ten on the Australian ARIA Albums Chart and is her highest selling album to date, being certified double platinum by ARIA. The album nominated Bainbridge for eight awards throughout the 1995 and the 1996 ARIA Awards including; "Best Pop Release", "Breakthrough Artist - Single", "Best New Talent", "Best Female Artist", "Single of the Year", "Breakthrough Artist - Album", "Highest Selling Single" and "Highest Selling Album".