"Hoppípolla" ([ˈhɔʰpipʰɔtla], "Hopp í polla" is Icelandic for "Hopping into puddles") is a song by Icelandic band Sigur Rós from their 2005 album Takk.... It was released as the album's second single on 28 November 2005. The lyrics are mainly in Icelandic, with some nonsensical phrases, a "language" the band calls Vonlenska ("Hopelandic"). Written with spaces, the song's title would be "Hoppa í polla" (the "—a" in "hoppa" is not pronounced). As with many of the band's songs, it was given a nickname in the early stages of writing. "Hoppípolla" was "The Money Song", as the band was certain they had written a song which would have commercial success. It is the band's most successful single, charting at #24 on the UK Singles Chart in May 2006. It is considered the most well known song within its genre. The single also features "Með blóðnasir", an instrumental coda to "Hoppípolla", which is also featured on Takk...; and a studio remake of "Hafssól", a song previously released on the band's 1997 debut album, Von. The title appears as "Hafsól" on the single.

A promotional music video for "Hoppípolla" was made in November 2005. It was directed by Arni & Kinski and first aired during the week of 21 November 2005.

It depicts two groups of elderly friends strolling around the suburbs of Reykjavík and, just like children, pulling pranks on other people. Near the end of the video, the two groups meet each other in a graveyard to battle with water balloons and wooden swords. When one of them is injured and gets a bloody nose (which is referenced in the lyrics), the opponents run away in fear, while the others celebrate the victory. The video shows several shots of the friends jumping in puddles of water.

The band members are featured in the video: keyboardist Kjartan Sveinsson plays the victim of a Knock, Knock, Ginger trick, guitarist and vocalist Jón Þór Birgisson plays the cashier at a shop where an old man steals and eats some pears, drummer Orri Páll Dýrason can be seen repairing his bicycle, and bassist Georg Hólm can be seen cleaning.

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