Abbreviation of 'manics fan', ie a fan of The Manic Street Preachers. Oh yes. Noun or adjective.
'there are no manicsfans near where i live!'
'they start off a bit manicsfan tho... but only for half a chapter'
Originating in Letchworth, Herts, a bastardisation of the word 'cheers', intended to convey a sense of exasperation or mild annoyance. Often said with exaggerated 'eeee' sound.
'You need to sort your hair out, it looks like a monkey's arse'