snap one's fingers at v. phr. 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. [TahlilGaran] English Idioms Dictionary ▲