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shaiack the nanny
To act in a foolish and irresponsible manner; to "horse around": Don't shaiack the nanny!
Contributor's comments: In Wollongong where I grew up the term used was "stop shaiacking about", or "don't act the goat" or "don't act the nanny", but I never heard them all used in the one phrase.
Contributor's comments: This was used in this area and parts of Victoria around the 1940s and perhaps into the mid 1950s. Shiacking (however spelt) meant "mucking about (or around)". Acting the goat - Stop acting the goat - Don't be a nanny - were also used, but not with "shiacking" as a prefix to the expression.