snap your fingers
snap (or click) your fingersmake a sharp clicking sound by bending the last joint of the middle finger against the thumb and suddenly releasing it, typically in order to attract attention in a peremptory way or to accompany the beat of music.
snap your ˈfingers
1 attract somebody’s attention by making a sound with your thumb and middle finger: Waiters don’t like customers in restaurants who snap their fingers and shout ‘waiter!’
2 show you do not care about somebody/something: He snapped his fingers at the committee and walked angrily out of the room.