Real Dictionary

flick
verb: If something flicks in a particular direction, or if someone flicks it, it moves with a short, sudden movement.

flick in American English 1
a light, quick stroke, as with a whip; sudden, jerky movement; snap
to move quickly and jerkily; flutter
to strike, propel, remove, etc. with a light, quick, snapping stroke, as with the fingernail
intransitive verb: to move with a jerk or jerks
noun: a sudden light blow or tap, as with a whip or the finger
transitive verb: to strike lightly with a whip, the finger, etc

flick in American English 2
a film (sense 5)
noun: a motion picture

flick in British English 1
noun: a tap or quick stroke with the fingers, a whip, etc
verb: to touch with or as if with the finger or hand in a quick jerky movement

flick in British English 2
noun: a cinema film