flick

• tap, light slap; light sharp sound; quick movement (as of the fingers); film, movie, motion picture (slang)
hit lightly; slap lightly; remove by quickly brushing away; make a quick movement of the fingers
if something flicks in a particular direction or if someone or something flicks it in a particular direction, it moves there with a short, sudden movement. verb here but can also be used as a count noun. e.g. ...a quick upward flick.
if you flick something away, you remove it with a quick movement of your finger or hand.
if you flick something such as a whip or a towel, you hold one end and move your hand quickly up and then forward, so that the other end moves. verb here but can also be used as a count noun. e.g. he gave a flick of the whip.
you also flick something when you hit it sharply with your fingernail by pressing the fingernail against your thumb and suddenly releasing it.
if you flick a switch or catch, you press it sharply so that it moves.
if you flick through a book or magazine, you turn the pages quickly.