1. Noun. An ancient Hawaiian hand gesture whereby the thumb and pinky fingers are extended whilst the index, middle and ring fingers take the form found in a fist. The hand thus displayed is then shaken or 'shakka-ed' in alternating 180 degree movements. The 'shakka' represents the philosophy of 'hanging loose'. It is a common greeting gesture amongst male homo sapien sapiens.

2. Verb. To shakka, meaning to 'hang loose', take it easy, chillax or even #yolo.
Jono: Hey Frank! *shakkas*
Frank: Hey Jono! *shakkas*
Jono: Aw man I don't know if I'll drink tonight...
Frank: Shakka!
by shakka June 28, 2013
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To flip someone off with your middle finger
Jim responded with an enthusiastic French Shakka
by Ricky Benny September 19, 2022
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