F or more than 30 years, Green Day has been one of the most iconic acts in rock - but it turns out their band name has a surprisingly X-rated origin that many fans are only now finding out about.

Green Day have been putting out hit after hit for years (Image: ... The band even penned a track dubbed Green Day, which featured on their 1991 record 1039/Smoothed Out Slappy Hours.

It actually suited Green Day’s game plan for this tour, celebrating the 30th and 20th anniversary of its most angsty and best-loved albums, “Dookie” and “American Idiot.” ...