People beckon one another by extending an arm and making a scratching motion with their fingers.
A thumbs up sign can mean OK, cool, good-luck, thanks, I agree, etc.. Thumbs down means the opposite.
The chin flick; flicking your fingers under your chin signifies not knowing or not caring.
Pointing out people is considered to be rude. You generally point at someone else by moving your head slightly in his/her direction.
