Finger snapping

"[8] The practice of finger snapping is also popular within the poetry slam community, used by the audience as a spontaneous in-the-moment show of support or agreement with what is being shared by the poet.

[9] Finger snapping played a prominent part in a series of charity appeal adverts for Make Poverty History in 2005.

[11][12] Finger snapping at someone has long been used as a sassy diva gesture, done to express a taunting satisfaction following what one has considered to be an impressive insult or diss.

[14][15] In the Marvel Cinematic Universe live-action film Avengers: Infinity War (2018), Thanos snaps his fingers causing the Blip.

Sounds of a fingersnap also are sampled and used in many disparate genres of music, used mostly as percussion; the works of Angelo Badalamenti exhibit this in the soundtracks to, e.g., Twin Peaks, Lost Highway, as does the theme song from the television series The Addams Family.

A video of finger snapping
Alternative snapping technique