It comes from the word definately. So So Def Recordings, Def Leopard, Def Jam Recordings also has def in their name. Def Leppard's name comes from an intentional misspelling of the words Deaf Leopard.
Anyone you just have to pop your ear drum with an extremely loud sound or puncture it with an object.
for def leppard please check your latest hmv store
kill lower lvls than you, such as cows.
Quite a long while, depending on where you train.