The big secret about the wrist Flick in disc sports is…
there is no Flick.
There is no wrist flick in Frisbee. At least not in the way most people understand the of flicking the wrist. The Flick of the disc comes not from the wrist, but from the stopping of the arm. All the wrist does is stay loose. Get the arm moving and stop it quickly and if the wrist is loose the disc flicks. That’s it.
Accentuating the Flick
For a powerful flick, get the arm moving fast towards the target. Stop the arm quickly and sharply and pull the arm back and away from the target, keeping the wrist loose. This sharp and quick change in speed from 100% to -20% takes place in a millisecond — the faster the better. This can also be looked at as stopping the arm harder, but the pulling back aspect is quite important to achieving a more massive speed change in a tiny amount of time.