Australian slang synonymous with American terms such as "hipster" or "scenester".
Those girls are such coolsies with their bangs and iPods.
ayon kay Jon Wilcox ika-05 ng Nobyembre, 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.
ayon kay Nora Kay Figi ika-08 ng Abril, 2005