Here you go Gary T - Strine at it's best. (Strine is how Australians are supposed to pronounce the word, "Australian" and so it means our distinct Australian language) You are right that ochre is an earthy colour, but an "ocher" (sometimes written okker; pron: okka) = an uncultivated Australian male arvo = afternoon footie = football chook = chicken (chook raffles are popular in footie clubs) mozzie = mosquito barbie = bar-b-que yobbo = similar to ocker ute = open backed van bludger = someone who bludges to bludge = do no work or borrow without the intention of paying back bubbler = drinking fountain
There are thousands of others. If you are interested there's a very good site which has a lot of Australian slang definitions: http://www.apex.net.au/~me/indexas.html
Bob's your uncle: Here in Oz we use it to mean "and that's that" or "hey presto" at the end of an explanation as to why or how something works or happens.