The Lord Weird Slough Feg (shortened to Slough Feg in 2005) is a heavy metal band that formed in Pennsylvania in the early 1990s. Taking the Slough-Feg portion of their name from Celtic folklore, the band released their self-titled debut album in 1996. The band plays a breed of folk-tinged heavy/power metal that's difficult to compare to other bands, but combines influences such as Iron Maiden and Thin Lizzy, and bears a passing relationship to English folk metal band Skyclad.

Slough Feg's 2003 album Traveller was a concept album based on GDW's role playing game of the same name.

The band has also toured the United States, doing a coast-to-coast tour for the first time in the summer of 2005 with another such tour planned for the summer of 2006, which will include an appearance at the first annual Alehorn of Power festival in Chicago, IL.