snap one's fingers at

To show contempt for; show no respect for; pay no attention to; scorn; disregard.
John snapped his fingers at the sign that said "Do not enter," and he went in the door.
The highway sign said "Speed limit, 35 miles per hour," but when a driver snapped his fingers at it by going 55 miles an hour, a motorcycle policeman arrested him.
Categories: {v. phr.}