the word Mether-pronounced Meffa - was someone who drank Meths.normally a homeless or down and out.
A friend of mine once called me an effing Meffa because i had odd socks on....
its all relative i s'pose!
A friend of mine used to wear odd socks, waiting for someone to point it out. He would then look down at his socks, look up and say "That's funny, I've got another pair like this at home!".