Australian slang synonymous with American terms such as "hipster" or "scenester".
Those girls are such coolsies with their bangs and iPods.
av Jon Wilcox 5 november 2005
1 more definition
A "cute-ified" term for cool; similar to calling a sip of beer "a sippy of beer".
It's really coolsies that you went to the mall.
av Nora Kay Figi 8 april 2005