"Sheena Is a Parasite" is the debut single by English rock band the Horrors, released in April 2006 by Loog Records.

The title and content are adapted from the Ramones single "Sheena Is a Punk Rocker" as well as the Cramps' "Sheena's in a Goth Gang", and the song chronicles the demise of punk music and its cultural influence.

The B-side is a cover of the Screaming Lord Sutch song "Jack the Ripper".

The Chris Cunningham-directed video starred Academy Award nominee Samantha Morton as the song's manic, transmogrifying subject who whipped around like a banshee and spewed her intestines at the camera.

Sharply edited and shot on a low budget, the video was instantly banned from MTV UK purely on the basis of the use of strobe lights, not because of the gory subject matter (as was erroneously reported by NME).