Flick is an action performed with the thumb and forefinger in order to get rid of dust, dirt or an insect. The momentum of the “flick” can be rather fierce and propel the unwanted object away at great speed.
I remember flicking spitballs when I was at school and I guess earlier generations flicked marbles and the like.
Now it seems we can flick emails!
We’ll flick you an email when the technician has finished and your machine is ready to pick up.
I heard this use several times in my week in New Zealand so it is obviously gaining in use.