shakka

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.

To flip someone off with your middle finger