Here in the UK, 'munted' means something entirely different.
Meaning 'to be extremely intoxicated by some (almost certainly illegal) substannce'
'hammered'-same meaning.
Rat arsed-usually meaning extremely drunk, pissed as a fart, but can be applied to other substances, but most often to alcohol intoxication, very, very drunk.
'buggered' (applied to object, as in 'its buggered, don't bother trying to use/start it')