A southy is a blond headed male who is in the top ten of the ugliest people in the southern hemisphere. They love to yell out random names and hit strangers repeadedly.
To southy someone is to walk right up to some one and start yell at them for no reason then stab them with a knife.
"Oh my god theres a massiive southy over there, it's coming at us ahh."
When something is so hedeous everybody just throws up.