There are many types of flicks ranging from simple to extremely complex. The ones covered here will be the expert level flicks. At this point you should be comfortable flicking the ball normally.
A mix of the tornado spin, upside down aerials, and bounce dribbling. Pop the ball on your car. Do a tornado spin by Air-Rolling left/right and turning left/right to cancel the spin. This will scoop the ball into a position where you can backflip into the ball.