"30 Days in the Hole" was the seventh single by Englishrock group Humble Pie. Released in 1972, the song received moderate radio airplay but failed to chart. The B-side on its US release was "Sweet Peace and Time", while everywhere else the B-side featured "C'mon Everybody" and "Road Runner". It was released on the band's Smokin' album.
The song, a Steve Marriott composition, bemoans being arrested for possession of small quantities of illegal drugs, including cocaine; Durban poison, a potent strain of marijuana, and Red Lebanese and Black Nepalese, two types of hashish. "New Castle Brown" is often mistaken as a reference to Newcastle Brown Ale but actually refers to Heroin also known as "Brown" or "Smack".
Black Nepalese, it's got you weak in your knees, it's just some seeds and dust that you got bust on, you know it's hard to believe, 30 days in the hole....
The song has been covered by several groups, most notably Gov't Mule, Mr. Big, and Kick Axe. It remains one of Humble Pie's best known songs.