U.D.O. + Halcyon Way + Winter Nights + Magus Beast

What does U.D.O. stand for? Given that the band's frontman is Udo Dirkschneider, formerly lead growler for German power-metal prototype Accept (of "Balls to the Wall" repute), seems pretty clear it stands for banging your head, old-school style. The group is touring behind its latest, Steelhammer.