I was going to suggest that maybe Manowar should no longer be consider the embarrassment of metal, but then I realised that it's a piss take on metal.
Massacration is a fictional American heavy metal band created by Brazilian humorists and musicians Bruno Sutter (as vocalist Detonator), Fausto Fanti (as lead guitarist Blondie Hammett), Marco Antônio Alves (as bassist Metal Avenger), Adriano Silva (as rhythm guitarist Headmaster) and Felipe Torres (as drummer Jimmy the Hammer), all of them part of the comedy troupe Hermes & Renato.
Apparently they've made a number of songs and videos in the vein of Spinal Tap but the lyrics are a mix of broken English and Portuguese so even if you could watch the clips you may not understand them.